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.
Find a lab
- Lab Search database — Find an accredited lab. Search by area, environmental parameter (analytes), and more.
- Map of Commercial Environmental Laboratory Locations makes it easier to find locations in your area that may take your environmental samples.
- How to choose an analytical laboratory offers considerations to keep in mind when deciding which lab to hire for your analyses.
Printable lab lists
Information for labs
- Manuals & procedures for accredited labs has the latest manual, procedures, methods, codes, and other accreditation topics.
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 "email@example.com" to your contacts list.