Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

See more about this collection...

7Q10 for High Flows on the Columbia/Snake Rivers

Guidelines for arriving at 7Q10 for dissolved gas standards.

https://ecology.wa.gov/7q10forhighflows

TransAlta Best Available Retrofit Technology (BART) order, second revision, 7/29/20

This is the second revised TransAlta Best Available Retrofit Technology (BART) order, 7/29/20.

https://ecology.wa.gov/20200729transaltabartorderrevised

2022FinalRegistrationBudget

Final 2022-2023 Budget for Air Quality Registration

https://ecology.wa.gov/2022finalregistrationbudget

Air Operating Permit Report for Fiscal Years 2022 and 2023, updated November 2021

This is the workload analysis and budget report for the Air Operating Permit Program for Fiscal Years 2022 and 2023, updated November 2021.

https://ecology.wa.gov/202111aopreportfy22

Technical Support Document for Best Available Retrofit Technology (BART) order second revision, TransAlta, 7/20

This is the technical support document for the second revision of the Best Available Retrofit Technology (BART) order for TransAlta, 7/20.

https://ecology.wa.gov/202007transaltabart2tsd

Fire Mountain Farms biosolids hearing presentation

Hearing presentation from the 2020 Fire Mountain Farms proposal to land apply biosolids at five sites in Lewis county

https://ecology.wa.gov/2020-biosolids-hearing-presentation

Fire Mountain Farms biosolids hearing presentation script

Hearing presentation script from the 2020 Fire Mountain Farms proposal to land apply biosolids at five sites in Lewis county

https://ecology.wa.gov/2020-biosolids-hearing-script

Adopted rule language (WAC 173-03) 11/15/17

This is adopted rule language for WAC 173-03 Public Records.

https://ecology.wa.gov/adopted-rule-language-wac-173-03-11-15-17

Second SEIS Kalama SEPA notice

The SEPA notice that Ecology will conduct a second Supplemental Environmental Impact Statement.

https://ecology.wa.gov/2019-nov22-2ndseiskalama-sepa-notice

Adopted rule language (WAC 173-407) 02/21/18

This is adopted rule language for WAC 173-407 Greenhouse Gas Mitigation Requirements and Emissions Performance Standard for Power Plants.

https://ecology.wa.gov/adopted-rule-language-wac-173-407-02-21-18

Adopted rule language (WAC 173-323) 12/18/17

This is adopted rule language for WAC 173-323 Grants and loans.

https://ecology.wa.gov/adopted-rule-language-wac-173-323-12-18-17

Notification letter Second SEIS

A letter notifying the applicants of Ecology's decision to conduct a second Supplemental Impact Statement for the proposed Kalama methanol facility.

https://ecology.wa.gov/2019-nov22-2ndseiskalamaletter

Adopted Rule language (WAC 173-201A) 1/23/19

This is the adopted rule language for Chapter 173-201A WAC (recreation use criteria).

https://ecology.wa.gov/ots-adopted-rule-language

Fact Sheet Addendum

Fact sheet addendum to the 2019 modified general permit

https://ecology.wa.gov/ffpmodifiedfsaddendum-draft

Adopted rule language (WAC 173-201A) 08/01/16

This is adopted rule language for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-08-01-16

Stormwater Control Transfer Program second draft comments

Ecology is issuing this second draft guidance in concert with a companion draft guidance, Building Cities in the Rain, being issued by the Department of Commerce

https://ecology.wa.gov/2nd-draft-comments

Adopted rule language (WAC 173-224) 06/29/23

This is adopted rule language for WAC 173-224 Water Quality Permit Fees

https://ecology.wa.gov/adopted-rule-language-wac-173-224-06-29-23

Memorandum of Understanding Cruise Operations in Washington State

Agreement between Ecology and the Cruise ships

https://ecology.wa.gov/2024-cruise-ship-mou

Auto Body Shop Surface Coating Guide, April 2020

This is the auto body shop surface coating guide, April 2020.

https://ecology.wa.gov/202004bodyshopsurfacecoat