Washington laboratory directory
State-certified laboratory
Grays Harbor County Water Testing Lab
310 West Spruce Street certifications/Laboratory-Accreditation/Applying-for-laboratory-accreditation, Montesano, WA, 98563-2614
Services listed in the certification record
Certified for: Drinking water
Address310 West Spruce Street certifications/Laboratory-Accreditation/Applying-for-laboratory-accreditation, Montesano, WA, 98563-2614
Phone(360) 249-4413
Certification statuscertified
Certifying stateWashington (WA)
Residential customersResidential service unknown — confirm with lab
Sample methodSample intake unknown — confirm with lab
Source listOfficial state source
How to use a water testing lab
Contact the laboratory before collecting a sample. Ask whether it offers the test you need, request its current sampling instructions and containers, and confirm timing, pricing, and how to submit the sample.
Listing data fetched from the official source: 2026-09-02T14:05:33+00:00 · View listing data (JSON)
Is this your lab?
Claim this listing or report an update: email hello [at] watertestingfinder [dot] com and put lab ID WA-4a23e3a54e544206 in the subject line.