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.
Records search checklist
Before buying property, use the records search checklist for due diligence and to know past uses.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups/records-search-checklist
Tools for cleaning up petroleum contaminated sites
We have online tools and guidance to help you clean up petroleum-contaminated sites.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/clean-up-petroleum-contamination
Pollution prevention assistance (PPA)
Businesses can get free, non-regulatory pollution prevention help from local PPA specialists.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/pollution-prevention-services/pollution-prevention-assistance
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-clean-up-tools/clarc
Sand & Gravel Permit guidance
Guidance to implement your Sand & Gravel General Permit.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/sand-and-gravel-permit-guidance
CLARC data tables and other technical information
Download CLARC data tables for information that helps site managers determine cleanup levels.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/data-tables
CLARC glossary
A glossary for terms and acronyms in CLARC's resource pages.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/glossary
Grays Harbor terminal expansion environmental reviews
The current status of environmental reviews for two oil-related proposals in Grays Harbor.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/grays-harbor-terminal-expansion
CLARC guidance
Use these guidance documents in combination with CLARC to establish cleanup levels.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/contamination-clean-up-tools/clarc/guidance
Overview of compliance & enforcement at Ecology
View the compliance and enforcement authority we have, and what actions we have recently taken.
https://ecology.wa.gov/regulations-permits/compliance-enforcement/overview-of-compliance-enforcement
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