Get your water tested in Washington.
The labs Washington certifies to test drinking water, from the state’s own list of Oct. 9, 2026. A lab test is the only way to know what is in your own tap or well.
The short answer
Washington’s list has 84 labs certified to test drinking water: 47 in Washington and 37 in other states. One of the labs here is named for a water utility and may test only its own water, so it comes last. The list says 83 take samples from homeowners.
Certification is test by test, so check that a lab is certified for what you want tested, and call first: it will say which bottles to use and how soon the sample has to arrive.
Labs in Washington
46 labs, by city.
| Lab | City | Phone | Certified for | Takes homeowners’ samples |
|---|---|---|---|---|
| Freshwater Analytical Labs, LLC | Arlington | (360) 913-7542 | Bacteria | Yes |
| Eurofins DW and WW West, Washington Laboratory | Burlington | (360) 757-1400 | Bacteria, nitrate, minerals and other inorganics, disinfection byproducts | Yes |
| Lewis County Environmental Health Laboratory | Chehalis | (360) 740-1237 | Bacteria, nitrate | Yes |
| Walla Walla Regional Water Testing Services | College Place | (509) 526-9287 | Bacteria, nitrate | Yes |
| Lincoln County Environmental Health Lab | Davenport | (509) 215-1034 | Bacteria | Yes |
| Everett Environmental Laboratory | Everett | (425) 257-8230 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| Precision Analytical Laboratories, LLC | Everett | (425) 740-4597 | Lead and copper, metals, minerals and other inorganics | Yes |
| Exact Scientific Services, Inc. | Ferndale | (360) 733-1205 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts | Yes |
| Klickitat County Goldendale Lab | Goldendale | (509) 493-6211 | Bacteria | Yes |
| ALS Environmental - Kelso | Kelso | (360) 577-7222 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity | Yes |
| Benton-Franklin Health District Lab | Kennewick | (509) 460-4206 | Bacteria, nitrate, minerals and other inorganics | Yes |
| Aqua Test, Incorporated | Maple Valley | (425) 432-9360 | Bacteria, nitrate | Yes |
| Grays Harbor County Water Testing Lab | Montesano | (360) 249-4413 | Bacteria, nitrate | Yes |
| Soiltest Farm Consultants, Inc. Laboratory | Moses Lake | (509) 765-1622 | Nitrate, minerals and other inorganics | Yes |
| Okanogan County Public Health Laboratory | Okanogan | (509) 422-7140 | Bacteria, nitrate | Yes |
| Olympic Analytical LLC dba Vanguard Laboratory | Olympia | (360) 967-7010 | Bacteria, nitrate | Yes |
| Thurston County Health Department Laboratory | Olympia | (360) 867-2631 | Bacteria, nitrate | Yes |
| AV Labs, Inc | Othello | (509) 488-2468 | Bacteria | Yes |
| Matrix Sciences International Inc. dba KTL | Pasco | (509) 547-3838 | Nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| RJ Lee Group, Inc. Columbia Basin Analytical Laboratories | Pasco | (509) 792-1951 | Nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| Clallam County Environmental Laboratory | Port Angeles | (360) 417-2334 | Bacteria, nitrate | Yes |
| Spectra Laboratories - Kitsap, LLC | Poulsbo | (360) 779-5141 | Bacteria, nitrate, minerals and other inorganics | Yes |
| OnSite Environmental, Inc. | Redmond | (425) 883-3881 | Lead and copper, metals, minerals and other inorganics | Yes |
| AmTest Laboratories | Renton | (425) 885-1664 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, disinfection byproducts | Yes |
| Energy Northwest Environmental Services Lab | Richland | (509) 377-8058 | Nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| Energy NW Environmental (PPL) Lab | Richland | (509) 372-5429 | Bacteria | Yes |
| Alliance Technical Group, LLC-Seattle | Seattle | (206) 352-3790 | Bacteria, lead and copper, metals | Yes |
| Brooks Applied Labs, LLC | Seattle | (206) 753-6119 | Lead and copper, metals | Yes |
| Eurofins EPK Built Environment Testing, LLC | Seattle | (206) 781-0155 | Bacteria, asbestos | Yes |
| Friedman & Bruya, Inc. | Seattle | (800) 487-8231 | Lead and copper, metals | Yes |
| IEH Analytical Laboratories | Seattle | (206) 632-2715 | Nitrate, lead and copper, metals, minerals and other inorganics, PFAS | Yes |
| MCL Food Testing | Seattle | (206) 633-3637 | Bacteria | Yes |
| NVL Laboratories, Inc | Seattle | (206) 547-0100 | Lead and copper, metals | Yes |
| Seattle-King Co Dept of Public Health Lab | Seattle | (206) 744-8950 | Bacteria | Yes |
| Pacific County DCD WQ Laboratory | South Bend | (360) 875-9356 | Bacteria | Yes |
| Anatek Labs, Inc - Spokane | Spokane | (509) 838-3999 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity | Yes |
| Eurofins Spokane | Spokane Valley | (509) 924-9200 | Bacteria, nitrate, minerals and other inorganics | Yes |
| Tshimakain Creek Laboratories | Spokane Valley | (509) 928-3577 | Bacteria, nitrate, minerals and other inorganics | Yes |
| Ag Health Laboratories, Inc. | Sunnyside | (509) 836-2020 | Bacteria, nitrate | Yes |
| Water Management Laboratories, Inc. | Tacoma | (253) 531-3121 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity | Yes |
| Analytical Resources, LLC | Tukwila | (206) 695-6200 | Nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| BSK Associates - Vancouver | Vancouver | (360) 750-0055 | Bacteria, nitrate, minerals and other inorganics | Yes |
| Anatek Labs, Inc - Wenatchee | Wenatchee | (509) 701-8362 | Bacteria | Yes |
| Klickitat County White Salmon Lab | White Salmon | (509) 493-6211 | Bacteria | Yes |
| Anatek Labs, Inc. - Yakima | Yakima | (509) 225-9404 | Bacteria, nitrate, minerals and other inorganics | Yes |
| LabTest | Yakima | (509) 469-8378 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics | Yes |
Labs in other states
37 labs Washington certifies outside the state, by state and city. Ask whether a lab takes samples by mail, and how fast they have to arrive.
| Lab | City | Phone | Certified for | Takes homeowners’ samples |
|---|---|---|---|---|
| Ceres Analytical Laboratory, Inc. | El Dorado Hills, CA | (916) 932-5011 | Organic chemicals | Yes |
| Onterris Laboratories, LLC - El Dorado Hills | El Dorado Hills, CA | (916) 673-1520 | Organic chemicals, PFAS | Yes |
| BSK Associates | Fresno, CA | (559) 497-2888 ext. 118 | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity | Yes |
| 49er Water Laboratory | Jackson, CA | (844) 519-2837 | Bacteria, nitrate | Yes |
| Eurofins Pomona | Pomona, CA | (626) 386-1129 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity | Yes |
| Continental Water Laboratory | Sacramento, CA | (916) 379-2323 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts | Yes |
| EMSL Analytical, Inc. - San Leandro | San Leandro, CA | (510) 895-3675 | Asbestos | Yes |
| Eurofins Sacramento | West Sacramento, CA | (916) 374-4308 | Minerals and other inorganics, organic chemicals, PFAS | Yes |
| ACZ Laboratories, Inc. | Steamboat Springs, CO | (970) 879-6590 ext. 584 | Nitrate, lead and copper, metals, minerals and other inorganics, radioactivity | Yes |
| Advanced Environmental Laboratories, Inc.- Jacksonville | Jacksonville, FL | (904) 363-9350 | PFAS | Yes |
| SGS - Orlando | Orlando, FL | (407) 425-6700 ext. 2625 | PFAS | Yes |
| Pace Analytical Services, LLC-Ormond Beach FL | Ormond Beach, FL | (386) 676-4803 | PFAS | Yes |
| Accurate Testing Labs L.L.C. | Coeur d'Alene, ID | (208) 762-8378 | Bacteria, nitrate | Yes |
| Anatek Labs, Inc - Moscow | Moscow, ID | (208) 883-2839 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity | Yes |
| Eurofins South Bend | South Bend, IN | (574) 472-5515 | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity | Yes |
| Battelle Analytical Chemistry Services Laboratory | Norwell, MA | (781) 681-5565 | PFAS | Yes |
| Pace Analytical Services, LLC - Minneapolis MN | Minneapolis, MN | (612) 607-6412 | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals | Yes |
| Eurofins St. Louis | Earth City, MO | (314) 298-8566 | Radioactivity | Yes |
| Energy Laboratories, Inc.-Billings, Mt | Billings, MT | (800) 735-4489 ext. 6276 | Lead and copper, metals, PFAS, radioactivity | Yes |
| Eurofins Built Environment Testing East - Cary | Cary, NC | (919) 481-1413 | Asbestos | Yes |
| Cape Fear Analytical, LLC | Wilmington, NC | (910) 795-0421 | Organic chemicals | Yes |
| Onterris Laboratories, LLC - Wilmington | Wilmington, NC | (910) 212-5856 | PFAS | Yes |
| SGS North America Inc. | Wilmington, NC | (910) 667-0134 | PFAS | Yes |
| EMSL Analytical, Inc. - Cinnaminson | Cinnaminson, NJ | (800) 220-3675 | Lead and copper, metals, PFAS, radioactivity, asbestos | Yes |
| ALS Environmental - Cincinnati | Cincinnati, OH | (513) 733-5336 | Asbestos | Yes |
| Alliance Technical Group, LLC-Akron | Cuyahoga Falls, OH | (330) 253-8211 | PFAS, radioactivity | Yes |
| Columbia Laboratories, Inc. | Portland, OR | (503) 254-1794 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics | Yes |
| Rose City Laboratories, LLC | Portland, OR | (503) 307-0096 | Bacteria, nitrate, lead and copper, metals | Yes |
| Pace Analytical Services, LLC - Greensburg, PA | Greensburg, PA | (724) 850-5630 | Radioactivity | Yes |
| Eurofins Lancaster Laboratories Environmental Testing, LLC | Lancaster, PA | (717) 556-7327 | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS | Yes |
| RJ Lee Group, Inc. - PA | Monroeville, PA | (724) 387-1986 | Nitrate, lead and copper, metals, minerals and other inorganics, PFAS, asbestos | Yes |
| GEL Laboratories, LLC | Charleston, SC | (843) 556-8171 | Radioactivity | Yes |
| Pace Analytical National Center for Testing & Innovation TN | Mt. Juliet, TN | (615) 773-9657 | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity | Yes |
| ALS Group USA, Corp | Houston, TX | (281) 530-5656 | Lead and copper, metals, organic chemicals | Yes |
| AmeriSci Richmond | Midlothian, VA | (804) 763-1200 | Asbestos | Yes |
| Analytical Services, Inc | Williston, VT | (800) 723-4432 | Not listed | Yes |
| Energy Laboratories, Inc. - Salt Creek | Casper, WY | (307) 235-0515 | Radioactivity | Yes |
Labs run by water utilities
1 lab named for a water utility or its plant. A utility’s lab may test only its own system’s water, so call before taking a sample there.
| Lab | City | Phone | Certified for | Takes homeowners’ samples |
|---|---|---|---|---|
| Lynden Water Treatment Plant Laboratory | Lynden | (360) 815-0143 | Bacteria | Yes |
What to ask a lab to test
- On a private well: no one else tests it. What to test a well for, and how often.
- On city water: your utility tests what leaves the plant, not what your own pipes add. Testing your tap for lead.
- What it costs: fees vary by lab and by test, and some states test wells for free. What a water test costs.
- Anything your utility’s report flags: a lab certified for that contaminant can test your own tap. Washington utilities’ reports.
Source: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses, dated Oct. 9, 2026, read Oct. 10, 2026. Labs are listed as the state lists them; what each is certified for is as far as the list says. Certifications change, so a lab’s own word is the latest.
A lab named for a water utility is listed apart. Distances on town pages are straight lines between ZIP code centers from the Census 2020 gazetteer. How labs are listed here.
Where to go next
- Testing a private wellWhat to test for every year, what else depends on where you live, and reading the results.How to test well water
- Washington utilitiesEvery utility with a full report: what its results show, and its violations.Washington tap water
- Labs in other statesEvery state TapBuff has read, and where to find the rest.Certified labs by state