New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington State

Open for public comment until Nov. 18, 2026. Comment on Regulations.gov

What it does

The Northwest Clean Air Agency (NWCAA), located in Washington State, submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of newly issued or revised New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP), as provided for under previously approved delegation mechanisms. The updated regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA) as they existed through October 18, 2023. The EPA is providing notice that it is proposing to update the delegation of certain NSPS and approve the delegation of certain NESHAP to NWCAA. The proposed delegation of authority under this action does not apply to sources located in Indian country.

The Environmental Protection Agency's summary, as published in the Federal Register.

What it would change

3 parts of Title 40 of the Code of Federal Regulations:

40 CFR 60, 40 CFR 61, 40 CFR 63

What happens next and when

Comments must be received on or before November 18, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R10-OAR-2026-4291 on Regulations.gov
• Title 40 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register