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.

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Chapter 173-224 WAC-Water Quality Permit Fees

This is the rulemaking page for chapter 173-224 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-224

Chapter 173-201A WAC (Natural Conditions)

This is the rulemaking page for Chapter 173-201A WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-201a-natural-conditions

Matheson Tri-Gas, Anacortes

We regulate water and hazardous waste activities at the Linde hydrogen plant in Anacortes.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/matheson-anacortes

Puget Sound Energy Ferndale Generating Station

We regulate water and hazardous waste at the PSE Ferndale electricity cogeneration station.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/puget-sound-energy-ferndale-generating-station

Tesoro Logistics Anacortes Facility

We regulate water and hazardous waste at the Tesoro Logistics operations in Anacortes.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/tesoro-logistics-anacortes

U.S. Oil Refinery

We regulate water and hazardous waste at the U.S. Oil and Refining Co. oil refinery in Tacoma.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/us-oil-refining

Equivalent stormwater manuals for municipal stormwater permits

We provide information for municipal stormwater permittees about equivalent stormwater manuals for Phase I and both the Eastern and Western Washington Phase II municipal stormwater permits.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/stormwater-manuals/equivalent-stormwater-manuals-for-municipal-stormw

Puget Sound Nutrient General Permit

We have issued the first Nutrient General Permit for WWTPs that discharge to Puget Sound.

https://ecology.wa.gov/regulations-permits/permits-certifications/nutrient-permit

WAC 173-50: Accreditation of Environmental Laboratories

This is the rulemaking page for Chapter 173-50 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-50

Stormwater monitoring

Stormwater monitoring helps us know how well water quality permits are working.

https://ecology.wa.gov/regulations-permits/reporting-requirements/stormwater-monitoring

Stormwater Action Monitoring - Effectiveness studies

Learning what works best to reduce urban runoff volumes and pollution in Western Washington.

https://ecology.wa.gov/regulations-permits/reporting-requirements/stormwater-monitoring/stormwater-action-monitoring/sam-effectiveness-studies

Stormwater Action Monitoring - Administering pooled resources

Credible and transparent administration of Stormwater Action Monitoring program.

https://ecology.wa.gov/regulations-permits/reporting-requirements/stormwater-monitoring/stormwater-action-monitoring/administration

Upland Finfish Hatching & Rearing General Permit

This water quality permit covers certain hatcheries that raise finfish species.

https://ecology.wa.gov/regulations-permits/permits-certifications/upland-finfish-permit

McKinley Paper Company

We regulate water and hazardous waste at the McKinley Paper Co. mill in Port Angeles.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/mckinley-paper

Phillips 66 Refinery

We regulate water and hazardous waste activities at the Phillips 66 refinery in Ferndale.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/phillips-66-refinery

SeaPort Sound Terminal

We regulate water and hazardous waste activities at the SeaPort Sound Terminal in Tacoma.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/seaport-sound-terminal

Tesoro Refinery

We regulate water, hazardous waste, and cleanup at Tesoro Refining & Marketing Company in Anacortes.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/tesoro-refinery

WestRock, Tacoma

We regulate air, water, and hazardous waste at RockTenn's WestRock pulp and paper mill in Tacoma.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/westrock-tacoma

Cruise ships in Washington waters

Formal agreement with cruise ship companies helps prevent pollution and protect marine waters.

https://ecology.wa.gov/regulations-permits/permits-certifications/cruise-ship-memorandum-of-agreement-mou

Cannabis licensing and the environment

Environmental permits may be required for cannabis growers and processors.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-cannabis-businesses