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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Water Quality Index spreadsheet, version 6

The Water Quality Index, or WQI, summarizes and presents water-quality data in an easily understood format. This spreadsheet is a downloadable tool for calculating a WQI score based on your own data.

https://ecology.wa.gov/water-quality-index-version-6

Vader-SEPA-letter

This is a letter from the City of Vader stating their proposal meets the Washington State Environmental Protection Act requirements.

https://ecology.wa.gov/vader-sepa-letter

Wastewater Facility Planning Design Projects Outcomes Summary form

Outcomes Summary form for Water Quality funded Wastewater Facility Planning and Design Projects

https://ecology.wa.gov/wastewater-facility-planning-design-projects-outco

Wastewater Facility Construction Projects Outcomes Summary form

Outcomes Summary form for Water Quality funded Wastewater Facility Construction Projects

https://ecology.wa.gov/water-quality-funded-wastewater-facility-construct

Water Quality Program Funding Recipient Training Announcement

Water Quality Program Funding Recipient Training Announcement - Calendar Year 2020

https://ecology.wa.gov/wqc-recipient-training-announcement

Water Quality Program Funding Recipient Training Announcement - Moses Lake

Water Quality Program Funding Recipient Training Announcement - Moses Lake location 2019.

https://ecology.wa.gov/wqc-recipient-training-info-moses-lake-2019

Yard care fact sheet E WA

Washington Waters Ours to Protect yard care fact sheet E WA

https://ecology.wa.gov/yard-care-fact-sheet-e-wa

Yard care poster E WA

Washington Waters Ours to Protect yard care poster E WA

https://ecology.wa.gov/yard-care-poster-e-wa

Northeast West Plains PFAS in drinking water sampling results map

The EPA created this map to summarize where samples were taken without showing private well locations.

https://ecology.wa.gov/west-plains-pfas-sampling-results-map

Irrigation System Aquatic Weed Control permit

This permit regulates the use of pesticides to manage plant and algae growth in irrigation systems.

https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/irrigation-system-aquatic-weed-control

Aquatic Mosquito Control General Permit

This permit allows the use of insecticides to control mosquitoes.

https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/aquatic-mosquito-control

Underground storage tank operator certification

Learn how to get the required underground storage tank operator certification.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/ust-owner-and-operator-resources/operator-certification-training

Air Liquide Hydrogen Plant, Anacortes

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

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/air-liquide

Columbia & Cowlitz Railway

We regulate the water and hazardous waste activities at the Columbia & Cowlitz Railway in Longview.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/columbia-cowlitz-railway

Eagle US 2, Longview

We regulate water and hazardous waste at the Axiall Corporation's Eagle US 2 plant in Longview.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/eagle-us-2-llc

North Pacific Paper Corporation (NORPAC)

We regulate the water and hazardous waste activities at the NORPAC paper mill in Longview.

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

Pacific Functional Fluids

We regulate wastewater and hazardous waste activities at Pacific Functional Fluids in Tacoma.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/pacific-functional-fluids

Water budgets of individual local trees

This study investigates how much water trees use and may help us mitigate stormwater.

https://ecology.wa.gov/regulations-permits/reporting-requirements/stormwater-monitoring/stormwater-action-monitoring/sam-effectiveness-studies/water-budgets-of-individual-local-trees

Northwest Alloys, Longview

We regulate water, hazardous waste and cleanup activities at Northwest Alloys in Longview.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/northwest-alloys-longview

Solvay Chemicals, Longview

We regulate the water and hazardous waste activities at the Solvay chemical plant in Longview.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/solvay-chemicals