28 named for coliform bacteria itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Nevada but on its list.
USGS estimate for Nevada.
How many labs test for coliform bacteria in Nevada
28 labs on Nevada's official drinking-water lab list are certified to test for coliform bacteria. All 28 are named for coliform bacteria on the list. 13 of them are marked as taking samples from the public. They are listed first. 10 are located outside Nevada.
The list is published by the Nevada Division of Environmental Protection (NDEP) - Laboratory Certification Program. List version on file: Live database, searched 2026-11-15 ("accurate as of the date and time of the search"). Fetched 2026-11-15 (UTC).
Nevada labs certified for coliform bacteria
Marked as taking public samples (13)
| Lab | Location | Bacteria certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| ASSET Laboratories - Las Vegas | Las Vegas, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| City of Elko Laboratory | Elko, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| City of Ely Laboratory | Ely, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| City of West Wendover | West Wendover, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| EFFEX Analytical Services | Las Vegas, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Nevada State Public Health Laboratory | Reno, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Silver State Analytical Laboratories - Las Vegas | Las Vegas, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Silver State Analytical Laboratories - Reno | Reno, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Silver State Analytical Labs - Elko | Elko, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Veritas Laboratories | Las Vegas, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Western Environmental Testing - Elko | Elko, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Western Environmental Testing - Las Vegas | Las Vegas, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
| Western Environmental Testing - Sparks | Sparks, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
Other labs on the list (15)
| Lab | Location | Bacteria certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| 49er Water Laboratory | Jackson, CA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Continental Water Laboratory - DS Services | Sacramento, CA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Energy Laboratories, Inc. - Billings-MT | Billings, MT | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Eurofins Pomona | Pomona, CA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Eurofins South Bend | South Bend, IN | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Incline Village G.I.D. | Incline Village, NV | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Mohave Labs | Bullhead City, AZ | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| National Testing Lab | Ypsilanti, MI | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Niagara Bottling, LLC | Howard, PA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Phigenics Analytical Services Laboratory - Fayetteville | Fayetteville, AR | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Phigenics Analytical Services Laboratory - Warrenville | Warrenville, IL | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Carson City Water Resource Recovery Facility | Carson City, NV | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 7/31/2027 |
| City of Henderson Water Quality Lab | Henderson, NV | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 7/31/2027 |
| Southern Nevada Water Authority Water Quality Laboratory | Henderson, NV | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 7/31/2027 |
| Truckee Meadows Water Authority | Sparks, NV | Named on the official list | Public samples: ask the lab Looks like a utility or municipal lab, judging by the name (our label, not the state list) | 7/31/2027 |
How the Nevada list marks public samples (whole list). Yes for the 13 labs on NDEP's table of "in-state Nevada Certified Drinking Water Laboratories that accept samples from the public" ("last updated May 15, 2025"; the table image is dated 9-7-2023), so confirm by phone. Not stated for the other labs. NDEP's database also marks each lab 'Commercial?' Yes/No: that is a lab-type flag, broader than 'homeowner', so call before you send a sample.
Before you send a sample, call the lab to confirm it is currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Status can change between list updates.
Why test for coliform bacteria in Nevada
About a third of the 397 domestic wells tested for bacteria in a national USGS study had total coliform. Read our coliform bacteria explainer.
EPA advises private-well owners to test every year for total coliform bacteria, nitrates, total dissolved solids and pH. [1]
Nevada guidance that mentions coliform bacteria:
- University of Nevada Cooperative Extension (2012 fact sheet, linked from NDEP's testing page): test every year for nitrate, pH, total dissolved solids and total coliform bacteria, and test more often if levels are close to the standards. Run a broad panel, such as a routine domestic analysis, every 5 to 10 years. Also test when buying a home, after drilling a new well, or if you are pregnant, planning a pregnancy or have an infant under 6 months. [2]
About 192,557 people in Nevada used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [3] Federal limits are written for public water systems, not private wells, so testing is up to the owner.
For tests that depend on your home (farms nearby, old plumbing, a new baby), use the which-tests checklist. When results arrive, check your numbers against EPA's limits. State guidance, county data and every lab: Nevada.
Other tests in Nevada
- U.S. EPA, Protect your home's water
- University of Nevada Cooperative Extension, Water Testing for Private Well Owners, SP-00-20 (updated Jan 11, 2012), hosted by NDEP
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- NDEP Laboratory Approval Status - Certified Lab List (public database, Matrix: Drinking Water) (official list)
NDEP Laboratory Approval Status - Certified Lab List (public database, Matrix: Drinking Water).
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