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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Pend Oreille County request for ECY SEPA lead

Pend Oreille County Commissioners' letter requesting Ecology take the lead agency role in Environmental review of PacWest Silicon’s proposal

https://ecology.wa.gov/po-county-to-ecy-request-lead-agency-status

2015 changes to 2009 vapor intrusion toxicity values and screening levels

2015 Excel spreadsheet of changes to the 2009 vapor intrusion toxicity values and screening levels.

https://ecology.wa.gov/2015vaporintrusionupdates

Rulemaking Announcement (WAC 173-50) 10/10/22

This is a rulemaking announcement (CR-101) for WAC 173-50 Accreditation of Environmental Laboratories.

https://ecology.wa.gov/rulemaking-announcement-wac-173-50-10-10-22

Applicant List for the SFY 2021 WQC funding cycle

WQC funding cycle SFY 2021 applicant list

https://ecology.wa.gov/wqcsfy2021applicantlist

Package A - Natural Attenuation Tool (Modules 1,2,3)

A calculation tool for demonstrating natural attenuation of groundwater is occurring and help predict when groundwater cleanup levels will be met under the Model Toxics Control Act.

https://ecology.wa.gov/pkganaturalattenuation

Package B - Natural Attenuation (Modules 4,5,6)

A calculation tool for demonstrating natural attenuation of groundwater is occurring and help predict when groundwater cleanup levels will be met under the Model Toxics Control Act.

https://ecology.wa.gov/pkgbnaturalattenuation

FY 2019 Water Quality Combined Applications

List of all projects submitted via application for funding to the Water Quality Combined Funding Program

https://ecology.wa.gov/wqc-fy19-applications

Preliminary Decisions Presentation (WAC 173-201A)

This is a public webinar presentation about the preliminary decisions to revise water contact recreational use criteria in the surface water quality standards (WAC 173-201A).

https://ecology.wa.gov/preliminary-decisions-presentation-wac-173-201a

EAGL Progress Report and Payment Request forms guidance

Guidance document for using the Ecology EAGL system for completing required project progress reports and payment requests for reimbursement

https://ecology.wa.gov/wqc-recipient-training-eagl-prpr-guidance

AFFF interactive DEIS plain text

This is the plain text version of the AFFF DEIS.

https://ecology.wa.gov/afff-interactive-deis-plain-text

Northeast West Plains PFAS March 2024 well sampling results meeting slides

Download the slides for the 6/6/24 NE West Plains drinking water sampling results meeting

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

Cosmo Specialty Fibers

We regulate air, water, and hazardous waste at Cosmo Specialty Fibers in Cosmopolis.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/cosmo-specialty-fibers

Nippon Dynawave, Longview

We regulate the air, water, and hazardous waste activities at the Nippon Dynawave mill in Longview.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/nippon-dynawave-longview

Northwest Alloys, Addy

We regulate water and hazardous waste at Alcoa's Northwest Alloys in Addy.

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

WestRock, Longview

We regulate air, water, and hazardous waste at the WestRock mill in Longview.

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

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

Aquatic pesticide permits

Find information about the various aquatic pesticide permits used in our state.

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

Cleanup Levels and Risk Calculation (CLARC)

CLARC's resources help you set contaminated site cleanup levels that comply with Washington law.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-cleanup-tools/clarc

Weyerhaeuser Lumber Mill, Longview

We regulate the water and hazardous waste activities at Weyerhaeuser's lumber mill in Longview.

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

Approved vendors for operator training

We have a list of approved vendors who provide UST operator training in Washington.

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