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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2020-21 Project Awards: Chehalis River Basin Aquatic Species Restoration Plan

Descriptive list of state grant awards for aquatic habitat restoration projects in the Chehalis Basin

https://ecology.wa.gov/2020-21-asrp-project-list

2020 SO2 attainment recommendation for Chelan and Douglas counties

Ecology's recommendation to EPA that the agency find Chelan and Douglas counties to be in attainment for sulfur dioxide air pollution.

https://ecology.wa.gov/20200716-ecologyso2attainmentrecommendationdouglas

Worst Case Drill Cycle

Find the schedule of drills for each plan holder (drill location), drill cycle, date of next Worst Case Drill, and location of last drill.

https://ecology.wa.gov/worst-case-drill-cycle

2021 Areas of Concern map

2021 map showing areas of concern for criteria pollutants

https://ecology.wa.gov/20210806-aoc-map-alt

TDG Draft EIS and Short-term Modification Language February 2019 Hearing Presentations

This is a PDF of the PowerPoint presentations provided at the February 2019 hearings on the draft EIS and short-term modification language for total dissolved gas criteria in WAC 173-201A.

https://ecology.wa.gov/tdg-draft-eis-and-short-term-modification-language

FCAAP 2023-25 Application Workshop Presentation Slides

Flood Control Assistance Account Program (FCAAP)2023-2025 Grant Application Workshop slideshow

https://ecology.wa.gov/fcaap-2023-25-application-workshop-presentation-sl

Stormwater Work Group recommendations for second round effectiveness studies

This letter from the SWG chair outlines the funding recommendations for the second round of effectiveness studies for Stormwater Action Monitoring

https://ecology.wa.gov/swg-esrecommendations06072017

Washington State Climate Resilience Strategy Summary - Vietnamese

Climate Resilience Strategy Summary in Vietnamese

https://ecology.wa.gov/vietnamese-climate-resilience-strategy-summary

Contained-in policy for contaminated soil and groundwater

Learn how to reduce cleanup costs by requesting approval under our contained-in policy.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contained-in-determinations

Water rights and dam safety policies, procedures & guidance

Policies, procedures & guidance guide our water right and dam safety work

https://ecology.wa.gov/regulations-permits/plans-policies/water-rights-dam-safety-policies-procedures-guidan

Cleaning up contamination with model remedies

Model remedies are ways to clean up routine, low-risk contaminated sites under MTCA.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/mtca-model-remedies

Wildlife response service providers

Wildlife response service providers (WRSP) manage wildlife response activities during an oil spill.

https://ecology.wa.gov/regulations-permits/plans-policies/contingency-planning-for-oil-industry/wildlife-response-service-providers

Spill management teams

Spill management teams are trained personnel who support spill responses.

https://ecology.wa.gov/regulations-permits/plans-policies/contingency-planning-for-oil-industry/spill-management-teams

Chapter 173-925 WAC

This is the rulemaking page for Chapter 173-925 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-925

Emergency Planning & Community Right-to-Know Act

Overview of Washington's EPCRA program and general reporting requirements.

https://ecology.wa.gov/regulations-permits/reporting-requirements/emergency-planning-community-right-to-know-act

Policies and guidance for site cleanups

Policies and guidance interpret the MTCA cleanup law and help you clean up contaminated sites.

https://ecology.wa.gov/regulations-permits/plans-policies/toxics-cleanup-policies

Empirical demonstrations under MTCA

Empirical demonstrations can show that applicable groundwater cleanup levels aren’t being exceeded.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/empirical-demonstrations-mtca

Environmental impact statement process

Overview about Environmental Impact Statements process under SEPA.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/guide-for-lead-agencies/environmental-impact-statements