Washington — PFOS

For Washington, state–chemical pair is Washington — PFOS; pfas compound is PFOS; concentration limit (ppt) is 15; regulation type is notification level; stricter than federal mcl is no, recorded from its source on 2026-08-14.

State–chemical pair: Washington — PFOS
State: Washington
PFAS compound: PFOS verified
Concentration limit (ppt): 15 verified
Regulation type: notification level
Stricter than federal MCL: no our reading
Regulatory citation: WAC 246-290

Sourcebclplaw.com

Verified2026-08-14

Review by2027-02-10

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

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

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

— bclplaw.com, retrieved 2026-08-14

Source

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

Last verified against source: 2026-08-14. Due for re-check by 2027-02-10. This page as Markdown · OKF bundle · full dataset as JSON.