Certified labs by state
Wyoming
Wyoming is unusual because EPA Region 8, not the state, directly certifies drinking-water laboratories for Wyoming analytes and methods. Wyoming DEQ’s Know Your Well program is the main official hub for private-well owners, and it specifically highlights annual bacteria/nitrate testing plus periodic metals/minerals and radionuclide concerns common in Wyoming groundwater. ([epa.gov](https://www.epa.gov/region8-waterops/certified-drinking-water-laboratories-systems-wyoming-and-tribal-lands-epa-region?utm_source=openai))
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- Certifies drinking water labs
- U.S. EPA Region 8 Laboratory Certification Program
- Official certified lab list
- Official page →
- Free or low-cost testing
- Wyoming DEQ says its PFAS in Drinking Water Monitoring Assistance Program provides cost-free sampling support to private well owners in proximity to known or potential PFAS sources. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/emerging-contaminants/pfas-in-drinking-water-monitoring-assistance-program/?utm_source=openai))
Official resources in Wyoming
State page for Wyoming private-well owners with testing recommendations, interpretation help, and a laboratory finder. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/groundwater/know-your-well/))
Official EPA Region 8 page linking the current certified-laboratory list for Wyoming drinking-water analyses. ([epa.gov](https://www.epa.gov/region8-waterops/certified-drinking-water-laboratories-systems-wyoming-and-tribal-lands-epa-region))
Official state lab page for Total Coliforms and E. coli testing, including forms and collection guidance. ([health.wyo.gov](https://health.wyo.gov/publichealth/lab/microbiology-lab/water/))
Official DEQ program offering cost-free PFAS and selected emerging-contaminant sampling support, including some private wells near known or potential PFAS sources. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/emerging-contaminants/pfas-in-drinking-water-monitoring-assistance-program/?utm_source=openai))
Official state office for groundwater permitting and administration; DEQ points private-well permit and construction questions here. ([seo.wyo.gov](https://seo.wyo.gov/ground-water/?utm_source=openai))
Key facts for Wyoming
- EPA Region 8 personnel perform on-site evaluations and certify Wyoming laboratories for particular drinking-water analytes and analytical methods. ([epa.gov](https://www.epa.gov/region8-waterops/certified-drinking-water-laboratories-systems-wyoming-and-tribal-lands-epa-region?utm_source=openai))
- Wyoming DEQ recommends private wells be tested yearly for total coliform, E. coli, and nitrate. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/groundwater/know-your-well/))
- Wyoming DEQ recommends arsenic, lead, copper, iron, manganese, sulfate, and TDS testing every five years. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/groundwater/know-your-well/))
- DEQ says uranium, radium, selenium, and methane are also common constituents in Wyoming groundwater. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/groundwater/know-your-well/))
- The Wyoming Public Health Laboratory accepts samples from private individuals and offers EPA-certified testing for Total Coliforms and E. coli. ([health.wyo.gov](https://health.wyo.gov/publichealth/lab/microbiology-lab/water/))
- Wyoming DEQ’s PFAS assistance program can provide cost-free sampling support for private wells near known or potential PFAS sources. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/emerging-contaminants/pfas-in-drinking-water-monitoring-assistance-program/?utm_source=openai))
What to do next
- Start with DEQ’s Know Your Well page, choose contaminants based on its Wyoming testing schedule, and use the EPA Region 8 certified-lab list for the analytes you need. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/groundwater/know-your-well/))
- If you only need bacteria screening, the Wyoming Public Health Laboratory is an official in-state option for Total Coliforms and E. coli. ([health.wyo.gov](https://health.wyo.gov/publichealth/lab/microbiology-lab/water/))
- If your well is near a known or potential PFAS source, ask DEQ whether you qualify for the PFAS Monitoring Assistance Program before paying for private testing. ([deq.wyoming.gov](https://deq.wyoming.gov/water-quality/emerging-contaminants/pfas-in-drinking-water-monitoring-assistance-program/?utm_source=openai))
Helpful guides
- How to choose a state-certified drinking water lab
- What to test your private well water for (and how often)
- How to collect a well water sample without ruining the test
- How to read a water test report: MCLs, units and flags