Environmental laboratory accreditation

Laboratories that analyze environmental samples must be capable of providing accurate and defensible analytical data. Many grant-based or legislatively-mandated scientific studies require the use of an accredited laboratory. In Washington, such labs must receive accreditation through Ecology to ensure they are conducting analyses according to prescribed methods. Many of these labs will accept samples from businesses or the public.

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Rulemaking finalized for Accreditation of Environmental Laboratories rule

Learn about updates to WAC 173-50 Accreditation of Environmental Laboratories enacted on Sept.1, 2023.

To assure accreditation renewals are promptly managed, please keep us updated with your current email address. We notify environmental labs six weeks before accreditation expires with a renewal application and a report of your lab's currently requested parameters. Contact Louise White if you do not receive a renewal application and/ or when you are ready to submit your completed renewal application.

To ensure you receive renewal notices, please add "donotreply@ecy.wa.gov" to your contacts list.