State-by-state comparison of legally enforceable and advisory concentration limits for PFAS compounds in drinking water. Each record is one state–chemical pair with the concentration limit (in parts per trillion), the regulation type (MCL, notification level, action level, health advisory, or guideline), the effective date, the statutory or regulatory citation, and whether the state limit is stricter than the federal EPA MCL. The federal MCLs are 4 ppt for PFOA and PFOS (affirmed May 2025); MCLs for PFHxS, PFNA, and HFPO-DA are under proposed rescission as of May 2026. State limits range from 0.00266 ppt (Nevada, PFOA) to 400,000 ppt (Michigan, PFHxA). Answers 'what is the legal PFAS limit in my state', 'is my state stricter than the federal standard', and 'which PFAS compounds does my state regulate'.

PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Alaska — PFOS, PFOA, PFNA, PFHxS, and PFHpA combined

**State:** Alaska

**PFAS compound:** PFOS, PFOA, PFNA, PFHxS, and PFHpA combined

**Concentration limit (ppt):** 70

**Regulation type:** action level

**Stricter than federal MCL:** n/a

**Regulatory citation:** Alaska DOT&PF Action Level

> Concentration level 70 ppt Chemical(s) and type of regulation 5 PFAS substances combined: PFOS, PFOA, PFNA, PFHxS, and PFHpA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Alaska — PFOS, PFOA, PFNA, PFHxS, and PFHpA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

chemical, regulation_type, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** California — PFBS

**State:** California

**PFAS compound:** PFBS

**Concentration limit (ppt):** 500

**Regulation type:** notification level

**Stricter than federal MCL:** n/a

**Regulatory citation:** California Health & Safety Code § 116378

> Concentration level 500 ppt (stated (stated by the California Water Boards as as 0.0005 mg/L) Chemical(s) and type of regulation PFBS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

California — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

regulation_type, regulatory_citation, state_chemical, stricter_than_federal


**State–chemical pair:** California — PFHxS

**State:** California

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 3

**Regulation type:** notification level

**Stricter than federal MCL:** yes

**Regulatory citation:** California Health & Safety Code § 116378

> Concentration level 3 ppt (stated by the California Water Boards as 3 ng/L) Chemical(s) and type of regulation PFHxS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

California — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** California — PFOA

**State:** California

**PFAS compound:** PFOA

**Concentration limit (ppt):** 4

**Regulation type:** notification level

**Stricter than federal MCL:** no

**Regulatory citation:** California Health & Safety Code § 116378

> Concentration level 4 ppt (stated by the California Water Boards as 4 ng/L) Chemical(s) and type of regulation PFOA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

California — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** California — PFOS

**State:** California

**PFAS compound:** PFOS

**Concentration limit (ppt):** 4

**Regulation type:** notification level

**Stricter than federal MCL:** no

**Regulatory citation:** California Health & Safety Code § 116378

> Concentration level 4 ppt (stated by the California Water Boards as 4 ng/L) Chemical(s) and type of regulation PFOS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

California — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Colorado — PFBS

**State:** Colorado

**PFAS compound:** PFBS

**Concentration limit (ppt):** 400,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Colorado Translation Level

> Concentration level 400,000 ppt (stated in the regulation as 400,000 ng/L) Chemical(s) and type of regulation PFBS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Colorado — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

regulation_type, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Colorado — PFHxS

**State:** Colorado

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 700

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Colorado Translation Level

> Concentration level 700 ppt (stated in the regulation as 700 ng/L) Chemical(s) and type of regulation PFHxS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Colorado — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Colorado — PFOS, PFOA, and PFNA combined

**State:** Colorado

**PFAS compound:** PFOS, PFOA, and PFNA combined

**Concentration limit (ppt):** 70

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Colorado Translation Level

> Concentration level 70 ppt (stated in the regulation as 70 ng/L) Chemical(s) and type of regulation 3 PFAS substances combined: PFOS, PFOA, and PFNA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Colorado — PFOS, PFOA, and PFNA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — 6:2 chloropolyfluoroether sulfonic acid

**State:** Connecticut

**PFAS compound:** 6:2 chloropolyfluoroether sulfonic acid

**Concentration limit (ppt):** 2

**Regulation type:** action level

**Stricter than federal MCL:** n/a

> Concentration level 2 ppt Chemical(s) and type of regulation 6:2 chloropolyfluoroether sulfonic acid (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — 6:2 chloropolyfluoroether sulfonic acid — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

regulation_type, state, state_chemical, stricter_than_federal


**State–chemical pair:** Connecticut — 8:2 chloropolyfluoroether sulfonic acid

**State:** Connecticut

**PFAS compound:** 8:2 chloropolyfluoroether sulfonic acid

**Concentration limit (ppt):** 5

**Regulation type:** action level

**Stricter than federal MCL:** n/a

> Concentration level 5 ppt Chemical(s) and type of regulation 8:2 chloropolyfluoroether sulfonic acid (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — 8:2 chloropolyfluoroether sulfonic acid — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — HFPO-DA

**State:** Connecticut

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 19

**Regulation type:** action level

**Stricter than federal MCL:** no

> Concentration level 19 ppt Chemical(s) and type of regulation Gen X or HFPO-DA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFBA

**State:** Connecticut

**PFAS compound:** PFBA

**Concentration limit (ppt):** 1,800

**Regulation type:** action level

**Stricter than federal MCL:** n/a

> Concentration level 1,800 ppt Chemical(s) and type of regulation PFBA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFBA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFBS

**State:** Connecticut

**PFAS compound:** PFBS

**Concentration limit (ppt):** 760

**Regulation type:** action level

**Stricter than federal MCL:** n/a

> Concentration level 760 ppt Chemical(s) and type of regulation PFBS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFHxA

**State:** Connecticut

**PFAS compound:** PFHxA

**Concentration limit (ppt):** 240

**Regulation type:** action level

**Stricter than federal MCL:** n/a

> Concentration level 240 ppt Chemical(s) and type of regulation PFHxA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFHxA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFHxS

**State:** Connecticut

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 49

**Regulation type:** action level

**Stricter than federal MCL:** no

> Concentration level 49 ppt Chemical(s) and type of regulation PFHxS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFNA

**State:** Connecticut

**PFAS compound:** PFNA

**Concentration limit (ppt):** 12

**Regulation type:** action level

**Stricter than federal MCL:** no

> Concentration level 12 ppt Chemical(s) and type of regulation PFNA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFOA

**State:** Connecticut

**PFAS compound:** PFOA

**Concentration limit (ppt):** 16

**Regulation type:** action level

**Stricter than federal MCL:** no

> Concentration level 16 ppt Chemical(s) and type of regulation PFOA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Connecticut — PFOS

**State:** Connecticut

**PFAS compound:** PFOS

**Concentration limit (ppt):** 10

**Regulation type:** action level

**Stricter than federal MCL:** no

> Concentration level 10 ppt Chemical(s) and type of regulation PFOS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Connecticut — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Delaware — PFHxS, PFNA, and Gen X

**State:** Delaware

**PFAS compound:** PFHxS, PFNA, and Gen X

**Concentration limit (ppt):** 10

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Delaware PFAS Action Plan

> Concentration level 10 ppt Chemical(s) and type of regulation PFHxS, PFNA, and Gen X (Forthcoming MCLs)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Delaware — PFHxS, PFNA, and Gen X — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Delaware — PFOS and PFOA

**State:** Delaware

**PFAS compound:** PFOS and PFOA

**Concentration limit (ppt):** 4

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Delaware PFAS Action Plan

> Concentration level 4 ppt Chemical(s) and type of regulation PFOS and PFOA (Forthcoming MCLs)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Delaware — PFOS and PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Federal — HFPO-DA

**State:** Federal

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 10

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> HFPO-DA (commonly known as GenX Chemicals) | 10 ppt | 10 ppt

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

effective_date, regulation_type, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Federal — PFHxS/PFNA/HFPO-DA/PFBS mixtures

**State:** Federal

**PFAS compound:** PFHxS, PFNA, HFPO-DA, and PFBS mixtures

**Concentration limit (ppt):** 1 (Hazard Index)

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> Mixtures containing two or more of PFHxS, PFNA, HFPO-DA, and PFBS | 1 (unitless) Hazard Index | 1 (unitless) Hazard Index

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — PFHxS/PFNA/HFPO-DA/PFBS mixtures — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

chemical, concentration_ppt, effective_date, regulation_type, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Federal — PFHxS

**State:** Federal

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 10

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> PFHxS | 10 ppt | 10 ppt

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Federal — PFNA

**State:** Federal

**PFAS compound:** PFNA

**Concentration limit (ppt):** 10

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> PFNA | 10 ppt | 10 ppt

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Federal — PFOA

**State:** Federal

**PFAS compound:** PFOA

**Concentration limit (ppt):** 4.0

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> PFOA | Zero | 4.0 parts per trillion (ppt) (also expressed as ng/L)

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Federal — PFOS

**State:** Federal

**PFAS compound:** PFOS

**Concentration limit (ppt):** 4.0

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2024-04-10

**Regulatory citation:** PFAS National Primary Drinking Water Regulation, 89 FR 32532

> PFOS | Zero | 4.0 ppt

Source: <https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas>

Federal — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — 6:2 FTOH

**State:** Hawaii

**PFAS compound:** 6:2 FTOH

**Concentration limit (ppt):** 5,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> 6:2 FTOH (5,000 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — 6:2 FTOH — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — 6:2 FTS

**State:** Hawaii

**PFAS compound:** 6:2 FTS

**Concentration limit (ppt):** 1,500

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFPeA and 6:2 FTS (1,500 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — 6:2 FTS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — 6:2 FTTAoS

**State:** Hawaii

**PFAS compound:** 6:2 FTTAoS

**Concentration limit (ppt):** 1,900

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFHxA and 6:2 FTTAoS (1,900 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — 6:2 FTTAoS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — 8:2 FTOH

**State:** Hawaii

**PFAS compound:** 8:2 FTOH

**Concentration limit (ppt):** 4,200

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> 8:2 FTOH (4,200 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — 8:2 FTOH — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — ADONA

**State:** Hawaii

**PFAS compound:** ADONA

**Concentration limit (ppt):** 1,200

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> ADONA (1,200 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — ADONA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — HFPO-DA

**State:** Hawaii

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFNA, PFHxS, and HFPO-DA (10 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFBA

**State:** Hawaii

**PFAS compound:** PFBA

**Concentration limit (ppt):** 15,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFBA (15,000 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFBA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFBS

**State:** Hawaii

**PFAS compound:** PFBS

**Concentration limit (ppt):** 2,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFBS (2,000 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFDA

**State:** Hawaii

**PFAS compound:** PFDA

**Concentration limit (ppt):** 7.7

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> Hawaii regulates 24 additional PFAS compounds, including the following: PFDA (7.7 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFDA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFDoDA

**State:** Hawaii

**PFAS compound:** PFDoDA

**Concentration limit (ppt):** 26

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFDoDA and PFTrDA (26 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFDoDA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFDS

**State:** Hawaii

**PFAS compound:** PFDS

**Concentration limit (ppt):** 38

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFHpS and PFDS (38 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFDS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFEtA

**State:** Hawaii

**PFAS compound:** PFEtA

**Concentration limit (ppt):** 18,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFEtA (18,000 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFEtA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFHpA

**State:** Hawaii

**PFAS compound:** PFHpA

**Concentration limit (ppt):** 77

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFHpA (77 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFHpA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFHpS

**State:** Hawaii

**PFAS compound:** PFHpS

**Concentration limit (ppt):** 38

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFHpS and PFDS (38 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFHpS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFHxA

**State:** Hawaii

**PFAS compound:** PFHxA

**Concentration limit (ppt):** 1,900

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFHxA and 6:2 FTTAoS (1,900 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFHxA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFHxS

**State:** Hawaii

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFNA, PFHxS, and HFPO-DA (10 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFNA

**State:** Hawaii

**PFAS compound:** PFNA

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFNA, PFHxS, and HFPO-DA (10 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFOA

**State:** Hawaii

**PFAS compound:** PFOA

**Concentration limit (ppt):** 4

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> Concentration level 4 ppt, etc. [1] (stated by the Hawaii Department of Health as 0.004 µg/L) Chemical(s) and type of regulation PFOS, PFOA, and 24 other PFAS compounds (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFOS

**State:** Hawaii

**PFAS compound:** PFOS

**Concentration limit (ppt):** 4

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> Concentration level 4 ppt, etc. [1] (stated by the Hawaii Department of Health as 0.004 µg/L) Chemical(s) and type of regulation PFOS, PFOA, and 24 other PFAS compounds (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFOSA

**State:** Hawaii

**PFAS compound:** PFOSA

**Concentration limit (ppt):** 46

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFOSA (46 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFOSA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFPeA

**State:** Hawaii

**PFAS compound:** PFPeA

**Concentration limit (ppt):** 1,500

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFPeA and 6:2 FTS (1,500 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFPeA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFPeS

**State:** Hawaii

**PFAS compound:** PFPeS

**Concentration limit (ppt):** 580

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFPeS (580 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFPeS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFPrA

**State:** Hawaii

**PFAS compound:** PFPrA

**Concentration limit (ppt):** 510

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFPrA (510 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFPrA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFTeDA

**State:** Hawaii

**PFAS compound:** PFTeDA

**Concentration limit (ppt):** 260

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFTeDA (260 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFTeDA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFTrDA

**State:** Hawaii

**PFAS compound:** PFTrDA

**Concentration limit (ppt):** 26

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFDoDA and PFTrDA (26 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFTrDA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Hawaii — PFUnDA

**State:** Hawaii

**PFAS compound:** PFUnDA

**Concentration limit (ppt):** 19

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Hawaii Department of Health Environmental Action Levels (Table A)

> PFUnDA (19 ppt)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Hawaii — PFUnDA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — HFPO-DA

**State:** Illinois

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** 35 IAC Part 620

> Concentration level 10 ppt (stated by the Illinois Environmental Pollution Control Agency as 10 ng/L) Chemical(s) and type of regulation HFPO-DA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — PFBS

**State:** Illinois

**PFAS compound:** PFBS

**Concentration limit (ppt):** 2,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** 35 IAC Part 620

> Concentration level 2,000 ppt (stated by the Illinois Environmental Pollution Control Agency as 2,000 ng/L) Chemical(s) and type of regulation PFBS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — PFHxS

**State:** Illinois

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** 35 IAC Part 620

> Concentration level 10 ppt (stated by the Illinois Environmental Pollution Control Agency as 10 ng/L) Chemical(s) and type of regulation PFHxS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — PFNA

**State:** Illinois

**PFAS compound:** PFNA

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** 35 IAC Part 620

> Concentration level 10 ppt (stated by the Illinois Environmental Pollution Control Agency as 10 ng/L) Chemical(s) and type of regulation PFNA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — PFOA

**State:** Illinois

**PFAS compound:** PFOA

**Concentration limit (ppt):** 4

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** 35 IAC Part 620

> Concentration level 4 ppt (stated by the California Water Boards as 4 ng/L) Chemical(s) and type of regulation PFOA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Illinois — PFOS

**State:** Illinois

**PFAS compound:** PFOS

**Concentration limit (ppt):** 4

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** 35 IAC Part 620

> Concentration level 4 ppt (stated by the Illinois Environmental Pollution Control Agency as 4 ng/L) Chemical(s) and type of regulation PFOS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Illinois — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Maine — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**State:** Maine

**PFAS compound:** PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**Concentration limit (ppt):** 20

**Regulation type:** notification level

**Stricter than federal MCL:** n/a

**Regulatory citation:** Maine Interim Drinking Water Standard (SP0064)

> Concentration level 20 ppt (stated in the Interim Drinking Water Standard as 20 ng/L) Chemical(s) and type of regulation 6 PFAS substances combined: PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Maine — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Maryland — PFHxS

**State:** Maryland

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 140

**Regulation type:** health advisory

**Stricter than federal MCL:** no

**Regulatory citation:** Maryland Department of Health PFHxS Advisory

> Concentration level 140 ppt Chemical(s) and type of regulation PFHxS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Maryland — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Massachusetts — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**State:** Massachusetts

**PFAS compound:** PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**Concentration limit (ppt):** 20

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Regulatory citation:** 310 CMR 22.00

> Concentration level 20 ppt (stated in the regulation as 20 ng/L) Chemical(s) and type of regulation 6 PFAS substances combined: PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Massachusetts — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

chemical, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Michigan — HFPO-DA

**State:** Michigan

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 370

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 370 ppt Chemical(s) and type of regulation Gen X or HFPO-DA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Michigan — PFBS

**State:** Michigan

**PFAS compound:** PFBS

**Concentration limit (ppt):** 420

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 420 ppt Chemical(s) and type of regulation PFBS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Michigan — PFHxA

**State:** Michigan

**PFAS compound:** PFHxA

**Concentration limit (ppt):** 400,000

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 400,000 ppt Chemical(s) and type of regulation PFHxA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFHxA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Michigan — PFHxS

**State:** Michigan

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 51

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 51 ppt Chemical(s) and type of regulation PFHxS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Michigan — PFNA

**State:** Michigan

**PFAS compound:** PFNA

**Concentration limit (ppt):** 6

**Regulation type:** MCL

**Stricter than federal MCL:** yes

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 6 ppt Chemical(s) and type of regulation PFNA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Michigan — PFOA

**State:** Michigan

**PFAS compound:** PFOA

**Concentration limit (ppt):** 8

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 8 ppt Chemical(s) and type of regulation PFOA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Michigan — PFOS

**State:** Michigan

**PFAS compound:** PFOS

**Concentration limit (ppt):** 16

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** Michigan PFAS Drinking Water Rules

> Concentration level 16 ppt Chemical(s) and type of regulation PFOS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Michigan — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFBA

**State:** Minnesota

**PFAS compound:** PFBA

**Concentration limit (ppt):** 7,000

**Regulation type:** health advisory

**Stricter than federal MCL:** n/a

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 7,000 ppt Chemical(s) and type of regulation PFBA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFBA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFBS

**State:** Minnesota

**PFAS compound:** PFBS

**Concentration limit (ppt):** 100

**Regulation type:** health advisory

**Stricter than federal MCL:** n/a

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 100 ppt Chemical(s) and type of regulation PFBS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFHxA

**State:** Minnesota

**PFAS compound:** PFHxA

**Concentration limit (ppt):** 200

**Regulation type:** health advisory

**Stricter than federal MCL:** n/a

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 200 ppt Chemical(s) and type of regulation PFHxA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFHxA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFHxS

**State:** Minnesota

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 47

**Regulation type:** health advisory

**Stricter than federal MCL:** no

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 47 ppt Chemical(s) and type of regulation PFHxS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFOA

**State:** Minnesota

**PFAS compound:** PFOA

**Concentration limit (ppt):** 0.0079

**Regulation type:** health advisory

**Stricter than federal MCL:** yes

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 0.0079 ppt Chemical(s) and type of regulation PFOA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Minnesota — PFOS

**State:** Minnesota

**PFAS compound:** PFOS

**Concentration limit (ppt):** 2.3

**Regulation type:** health advisory

**Stricter than federal MCL:** yes

**Regulatory citation:** Minnesota Department of Health Health Advisory

> Concentration level 2.3 ppt Chemical(s) and type of regulation PFOS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Minnesota — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Nevada — PFBS

**State:** Nevada

**PFAS compound:** PFBS

**Concentration limit (ppt):** 10,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Nevada Division of Environmental Protection Basic Comparison Levels

> Concentration level 10,000 ppt (stated by the Nevada Division of Environmental Protection as 10 µg/L) Chemical(s) and type of regulation PFBS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Nevada — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Nevada — PFOA (cancer risk)

**State:** Nevada

**PFAS compound:** PFOA (cancer risk)

**Concentration limit (ppt):** .00266

**Regulation type:** guideline

**Stricter than federal MCL:** yes

**Regulatory citation:** Nevada Division of Environmental Protection Basic Comparison Levels

> Concentration level .00266 ppt (stated by the Nevada Division of Environmental Protection as 0.00000266 µg/L) Chemical(s) and type of regulation PFOA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Nevada — PFOA (cancer risk) — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

chemical, regulation_type, regulatory_citation, state_chemical, stricter_than_federal


**State–chemical pair:** Nevada — PFOA (non-cancer risk)

**State:** Nevada

**PFAS compound:** PFOA (non-cancer risk)

**Concentration limit (ppt):** 1.97

**Regulation type:** guideline

**Stricter than federal MCL:** yes

**Regulatory citation:** Nevada Division of Environmental Protection Basic Comparison Levels

> Concentration level 1.97 ppt (stated by the Nevada Division of Environmental Protection as 0.00197 µg/L) Chemical(s) and type of regulation PFOA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Nevada — PFOA (non-cancer risk) — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Hampshire — PFHxS

**State:** New Hampshire

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 18

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** NH HB 1264 (2020)

> Concentration level 18 ppt Chemical(s) and type of regulation PFHxS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Hampshire — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Hampshire — PFNA

**State:** New Hampshire

**PFAS compound:** PFNA

**Concentration limit (ppt):** 11

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** NH HB 1264 (2020)

> Concentration level 11 ppt Chemical(s) and type of regulation PFNA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Hampshire — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Hampshire — PFOA

**State:** New Hampshire

**PFAS compound:** PFOA

**Concentration limit (ppt):** 12

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** NH HB 1264 (2020)

> Concentration level 12 ppt Chemical(s) and type of regulation PFOA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Hampshire — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Hampshire — PFOS

**State:** New Hampshire

**PFAS compound:** PFOS

**Concentration limit (ppt):** 15

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** NH HB 1264 (2020)

> Concentration level 15 ppt Chemical(s) and type of regulation PFOS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Hampshire — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Jersey — PFNA

**State:** New Jersey

**PFAS compound:** PFNA

**Concentration limit (ppt):** 13

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** N.J.A.C. 7:10

> Concentration level 13 ppt Chemical(s) and type of regulation PFNA and PFOS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Jersey — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Jersey — PFOA

**State:** New Jersey

**PFAS compound:** PFOA

**Concentration limit (ppt):** 14

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** N.J.A.C. 7:10

> Concentration level 14 ppt Chemical(s) and type of regulation PFOA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Jersey — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Jersey — PFOS

**State:** New Jersey

**PFAS compound:** PFOS

**Concentration limit (ppt):** 13

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** N.J.A.C. 7:10

> Concentration level 13 ppt Chemical(s) and type of regulation PFNA and PFOS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Jersey — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New Mexico — PFOS, PFHxS, and PFOA combined

**State:** New Mexico

**PFAS compound:** PFOS, PFHxS, and PFOA combined

**Concentration limit (ppt):** 70

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** 20.6.2 NMAC Toxic Pollutant Standard

> Concentration level 70 ppt Chemical(s) and type of regulation PFOS, PFHxS and PFOA combined (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New Mexico — PFOS, PFHxS, and PFOA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** New York — PFOA and PFOS

**State:** New York

**PFAS compound:** PFOA and PFOS

**Concentration limit (ppt):** 10

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** 10 NYCRR Part 5, Subpart 5-1

> Concentration level 10 ppt Chemical(s) and type of regulation PFOA and PFAS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

New York — PFOA and PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** North Carolina — HFPO-DA

**State:** North Carolina

**PFAS compound:** HFPO-DA

**Concentration limit (ppt):** 10

**Regulation type:** health advisory

**Stricter than federal MCL:** no

**Regulatory citation:** NC DHHS Health Advisory

> Concentration level 10 ppt Chemical(s) and type of regulation GenX or HFPO-DA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

North Carolina — HFPO-DA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Ohio — PFBS

**State:** Ohio

**PFAS compound:** PFBS

**Concentration limit (ppt):** 2,000

**Regulation type:** guideline

**Stricter than federal MCL:** n/a

**Regulatory citation:** Ohio PFAS Action Plan 2.0

> Concentration level 2,000 ppt Chemical(s) and type of regulation PFBS (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Ohio — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Ohio — PFHxS, PFNA, and Gen X

**State:** Ohio

**PFAS compound:** PFHxS, PFNA, and Gen X

**Concentration limit (ppt):** 10

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Ohio PFAS Action Plan 2.0

> Concentration level 10 ppt Chemical(s) and type of regulation PFHxS, PFNA, and Gen X (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Ohio — PFHxS, PFNA, and Gen X — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Ohio — PFOS and PFOA

**State:** Ohio

**PFAS compound:** PFOS and PFOA

**Concentration limit (ppt):** 4

**Regulation type:** guideline

**Stricter than federal MCL:** no

**Regulatory citation:** Ohio PFAS Action Plan 2.0

> Concentration level 4 ppt Chemical(s) and type of regulation PFOS and PFOA (Guidance)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Ohio — PFOS and PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Pennsylvania — PFOA

**State:** Pennsylvania

**PFAS compound:** PFOA

**Concentration limit (ppt):** 14

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** 25 Pa. Code Chapter 109

> Concentration level 14 ppt Chemical(s) and type of regulation PFOA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Pennsylvania — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Pennsylvania — PFOS

**State:** Pennsylvania

**PFAS compound:** PFOS

**Concentration limit (ppt):** 18

**Regulation type:** MCL

**Stricter than federal MCL:** no

**Regulatory citation:** 25 Pa. Code Chapter 109

> Concentration level 18 ppt Chemical(s) and type of regulation PFOS (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Pennsylvania — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Rhode Island — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**State:** Rhode Island

**PFAS compound:** PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined

**Concentration limit (ppt):** 20

**Regulation type:** notification level

**Stricter than federal MCL:** n/a

**Regulatory citation:** RI General Laws Title 46, Chapter 32

> Concentration level 20 ppt Chemical(s) and type of regulation 6 PFAS substances combined: PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Rhode Island — PFOA, PFOS, PFHxS, PFNA, PFHpA, and PFDA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Vermont — PFOA, PFOS, PFHpA, PFHxS, and PFNA combined

**State:** Vermont

**PFAS compound:** PFOA, PFOS, PFHpA, PFHxS, and PFNA combined

**Concentration limit (ppt):** 20

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Effective date:** 2020-03-17

**Regulatory citation:** Vermont Water Supply Rule

> Concentration level 20 ppt (stated in the regulation as 0.000002 mg/L) Chemical(s) and type of regulation 5 PFAS substances combined: PFOA, PFOS, PFHpA, PFHxS, and PFNA (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Vermont — PFOA, PFOS, PFHpA, PFHxS, and PFNA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances

chemical, effective_date, regulatory_citation, state, state_chemical, stricter_than_federal


**State–chemical pair:** Washington — PFBS

**State:** Washington

**PFAS compound:** PFBS

**Concentration limit (ppt):** 345

**Regulation type:** notification level

**Stricter than federal MCL:** n/a

**Regulatory citation:** WAC 246-290

> Concentration level 345 ppt Chemical(s) and type of regulation PFBS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Washington — PFBS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Washington — PFHxS

**State:** Washington

**PFAS compound:** PFHxS

**Concentration limit (ppt):** 65

**Regulation type:** notification level

**Stricter than federal MCL:** no

**Regulatory citation:** WAC 246-290

> Concentration level 65 ppt Chemical(s) and type of regulation PFHxS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Washington — PFHxS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Washington — PFNA

**State:** Washington

**PFAS compound:** PFNA

**Concentration limit (ppt):** 9

**Regulation type:** notification level

**Stricter than federal MCL:** yes

**Regulatory citation:** WAC 246-290

> Concentration level 9 ppt Chemical(s) and type of regulation PFNA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Washington — PFNA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Washington — PFOA

**State:** Washington

**PFAS compound:** PFOA

**Concentration limit (ppt):** 10

**Regulation type:** notification level

**Stricter than federal MCL:** no

**Regulatory citation:** WAC 246-290

> Concentration level 10 ppt Chemical(s) and type of regulation PFOA (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Washington — PFOA — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Washington — PFOS

**State:** Washington

**PFAS compound:** PFOS

**Concentration limit (ppt):** 15

**Regulation type:** notification level

**Stricter than federal MCL:** no

**Regulatory citation:** WAC 246-290

> Concentration level 15 ppt Chemical(s) and type of regulation PFOS (Notification)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Washington — PFOS — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances


**State–chemical pair:** Wisconsin — PFOS and PFOA combined

**State:** Wisconsin

**PFAS compound:** PFOS and PFOA combined

**Concentration limit (ppt):** 70

**Regulation type:** MCL

**Stricter than federal MCL:** n/a

**Regulatory citation:** NR 809, Wisconsin Administrative Code

> Concentration level 70 ppt Chemical(s) and type of regulation PFOS and PFOA combined (MCL)

Source: <https://www.bclplaw.com/en-US/events-insights-news/pfas-drinking-water-standards-state-by-state-regulations.html>

Wisconsin — PFOS and PFOA combined — PFAS drinking water concentration limits by US state — MCLs, notification levels, action levels, and health advisories for PFOA, PFOS, and other per- and polyfluoroalkyl substances