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.
Manuals & procedures for accredited labs
Download the procedure manual, and find tips and tools for accredited environmental labs.
https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation/manual-and-procedures-for-accredited-laboratories
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
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