---
type: jurisdictional-variation
id: hfcs-used-in-new-equipment-washington
asset: hfc-refrigerant-regulations-by-state
title: "Washington — HFC refrigerant GWP regulations by US state"
sources:
  - https://nasrc.org/hfc-policy-tracker/
source_quote: "Washington has Finalized a rulemaking to update <https://ecology.wa.gov/getattachment/eb351094-2b5e-49ce-b626-c90092542a75/OTS-4615-6-For-Filing.pdf> Chapter 173-443 WAC for HFCs and other fluorinated greenhouse gases that: Established GWP threshold less than 150 for HFCs used in new equipment (Jan 1, 2025)"
generated: true
harvested: 2026-08-05
stale_after: 2027-02-01
state: "Washington"
equipment_category: "HFCs used in new equipment"
gwp_limit: "less than 150"
effective_date: "Jan 1, 2025"
regulatory_status: "signed into law"
regulation_citation: "Chapter 173-443 WAC"
verified: true
---
**State:** Washington

**Equipment category:** HFCs used in new equipment

**GWP limit:** less than 150

**Effective date:** Jan 1, 2025

**Regulatory status:** signed into law

**Regulation citation:** Chapter 173-443 WAC

> Washington has Finalized a rulemaking to update <https://ecology.wa.gov/getattachment/eb351094-2b5e-49ce-b626-c90092542a75/OTS-4615-6-For-Filing.pdf> Chapter 173-443 WAC for HFCs and other fluorinated greenhouse gases that: Established GWP threshold less than 150 for HFCs used in new equipment (Jan 1, 2025)

Source: <https://nasrc.org/hfc-policy-tracker/>