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.
Email list: MTCA Cleanup Rule and Sediment Management Standards
Stay informed about contamination cleanup rulemakings.
https://ecology.wa.gov/email-list-mtca-cleanup-rule-and-sediment-management-standards
Hydrofluorocarbon rulemaking email notification list
Join our Hydrofluorocarbon (HFC) rulemaking email list
https://ecology.wa.gov/hydrofluorocarbon-rulemaking-email-notification-list
Biosolids laws, rules, and support documents
See Washington's biosolids laws, the administrative rules we operate under, and support documents.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/biosolids-laws-rules-and-support-documents
Rulemaking at Ecology
Find out about our rulemaking activities.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking
Noise pollution
Learn more about how to manage noise pollution.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/noise-pollution
Noise pollution — Frequently asked questions for residents
Do you have questions about noise pollution? Find some common questions and answers.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/noise-pollution/noise-pollution-faq-for-residents
Noise pollution — Frequently asked questions for local governments
Do you have questions about noise pollution? Find some common questions and answers for governments.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/noise-pollution/noise-pollution-faq-for-local-government
Frequently Asked Questions (FAQs) for Chapter 173-303
Frequently asked questions about Chapter 173-303 WAC, Dangerous Waste Regulations.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-303-faq
Exploratory rulemaking for Chapter 173-460 WAC – Controls for New Sources of Toxic Air Pollutants
This is the rulemaking page for Chap. 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-460-exploratory-rulemaking
Focus on: Washington’s climate policies and fuel prices
On Jan. 1, 2023, two new Washington laws designed to reduce greenhouse gas emissions took effect: the Clean Fuel Standard (CFS) and the Climate Commitment Act (CCA).
https://ecology.wa.gov/focus-on-washington-s-climate-policies-and-fuel-pr
Map: Spill response equipment locations
Interactive map and downloadable data for locations of spill response equipment around the state.
https://ecology.wa.gov/spill-response-equipment-locations
Map: Streamflow restoration law (ESSB 6091)
A map that describes the areas in the state where the new streamflow restoration law applies.
https://ecology.wa.gov/essb-6091-map
Hazardous Waste Institutional Memory (IM) Compendium
A reference tool that provides guidance about specific dangerous waste issues. Includes reference memos, letters and other documents written by Ecology staff.
https://ecology.wa.gov/hazardous-waste-institutional-memory-im-compendi
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
Mineral prospecting and placer mining
Information from Ecology and WDFW about mineral prospecting and placer mining, and ESHB 1261.
https://ecology.wa.gov/regulations-permits/permits-certifications/mineral-prospecting-and-placer-mining
Underground Injection Control (UIC) program: Chapter 173-218 WAC
We regulate discharge of injection well fluids to protect against groundwater contamination.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program
Underground injection control well registration requirements & information
Get Underground Injection Control (UIC) well registration requirements and information.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/underground-injection-control-program/uic-registration-requirements-information
401 Water Quality Certifications for non-hydropower permits
We review projects needing federal approval to assure compliance with state water quality standards.
https://ecology.wa.gov/regulations-permits/permits-certifications/401-water-quality-certification/non-hydropower-401-certifications
SEPA laws and regulations: current & historical revisions
We manage SEPA and related rules and provide background about rulemaking.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-laws-rules
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
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