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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Choosing an analytical laboratory

Take these steps and consider what you need when choosing an environmental laboratory.

https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation/how-to-choose-an-analytical-laboratory

Underground storage tank closures

Important information about closing your underground storage tanks.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/ust-owner-and-operator-resources/underground-storage-tank-closures

Quality assurance manual guidance for environmental labs

This guidance can help you write or review a quality assurance manual for your lab.

https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation/laboratory-quality-assurance-manual-checklist

SEPA subject index

References to SEPA topics in rule and statute.

https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-subject-index

Clean Water Act updated analytical methods

Learn about updates to approved analytical methods for testing non-potable water.

https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation/methods-update-rule

Proficiency testing requirements

Six proficiency testing sample providers are approved by our laboratory accreditation program.

https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation/proficiency-testing-providers