Get your water tested in Wyoming.
The short answer
Wyoming’s list has 12 labs certified to test drinking water. 3 of the labs here are named for a water utility and may test only its own water, so they come last.
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.
From the state
Wyoming Public Health Laboratory
Total coliform and E. coli testing that homeowners can use for their wells. New customers fill out the lab's customer form to open an account.
Water Testing, Wyoming Department of Health, checked Oct. 10, 2026
Labs in Wyoming
9 labs, by city.
| Lab | City | Phone | Certified for |
|---|---|---|---|
| Lincoln Water Quality Lab | Afton | (307) 885-9698 | Bacteria |
| Energy Laboratories Inc | Casper | (307) 235-0515 | Bacteria, nitrate, minerals and other inorganics, organic chemicals, radioactivity |
| Wyoming Public Health Lab | Cheyenne | (307) 777-6066 | Bacteria |
| Energy Laboratories Inc | Gillette | (307) 686-7175 | Bacteria |
| Teton County Water Laboratory | Jackson | (307) 732-8463 | Bacteria |
| Sage West Healthcare - Lander (formerly Lander Regional Hospital) | Lander | (307) 335-6246 | Bacteria |
| Wyoming Dept of Agriculture, Analytical Services Laboratory | Laramie | (307) 742-2984 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics |
| Sweetwater County Health Department | Rock Springs | (307) 872-3930 | Bacteria |
| Pace Analytical Services LLC WY | Sheridan | (307) 461-4938 | Bacteria, nitrate, lead and copper, metals, minerals and other inorganics, radioactivity |
Labs run by water utilities
3 labs 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 |
|---|---|---|---|
| Cheyenne Board of Public Utilities | Cheyenne | (307) 635-7693 | Bacteria |
| National Park Service, Mammoth Water Quality Control Lab | Mammoth Hot Springs | (307) 699-3675 | Bacteria |
| Town of Pinedale Microbiology Lab | Pinedale | (307) 367-2348 | Bacteria |
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. Wyoming utilities’ reports.
Source: EPA Region 8, certified drinking water laboratories in Wyoming, dated Feb. 17, 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
- Wyoming utilitiesEvery utility with a full report: what its results show, and its violations.Wyoming tap water
- Labs in other statesEvery state TapBuff has read, and where to find the rest.Certified labs by state