23 named for arsenic 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 arsenic in Nevada
23 labs on Nevada's official drinking-water lab list are certified to test for arsenic. All 23 are named for arsenic on the list. 5 of them are marked as taking samples from the public. They are listed first. 16 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 arsenic
Marked as taking public samples (5)
| Lab | Location | Arsenic 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 |
| 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 |
| Western Environmental Testing - Sparks | Sparks, NV | Named on the official list | Public samples: yes (per state) | 7/31/2027 |
Other labs on the list (18)
| Lab | Location | Arsenic certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| A&B Labs | Houston, TX | Named on the official list | Public samples: ask the lab | 7/31/2024 Date on list has passed |
| ALS Environmental - Kelso | Kelso, WA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Anatek Labs, Inc. - ID | Moscow, ID | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| BSK Associates | Fresno, CA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Chemtech-Ford | Sandy, UT | 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 |
| Environmental Science Corp. (dba Pace) | Mount Juliet, TN | 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 |
| GEL Laboratories, LLC | Charleston, SC | 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 |
| NSF International | Ann Arbor, MI | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Pace Analytical Services, LLC - Minneapolis MN | Minneapolis, MN | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| RTI International | Durham, NC | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| SGS North America, Inc. | Clovis, CA | Named on the official list | Public samples: ask the lab | 7/31/2027 |
| Weck Laboratories, Inc. | Industry, CA | Named on the official list | Public samples: ask the lab | 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 arsenic in Nevada
Arsenic is invisible, tasteless and mostly natural, and it comes in two forms that respond very differently to treatment. Read our arsenic explainer.
USGS estimates that the most private-well users with arsenic above 10 µg/L, EPA's limit for public water, live in Nye County, Clark County and Churchill County (about 6,192 people in Nye County, 2010 base year). USGS describes this kind of estimate as useful "for broad screening of the population at risk", so it says nothing certain about any one well. [1]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Nye County | 6,192 people (2010 base year) | |
| Clark County | 5,783 people (2010 base year) | |
| Churchill County | 4,887 people (2010 base year) | |
| Lyon County | 2,322 people (2010 base year) | |
| Humboldt County | 587 people (2010 base year) | |
| Washoe County | 449 people (2010 base year) |
USGS model estimate for broad screening, not a measurement of any well. Only a test tells you about your own well. Source: USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017), accessed 2026-11-01.
About 192,557 people in Nevada used private wells in 2015, by the USGS estimate of people on domestic self-supplied water. [2] 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
- USGS, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter (Ayotte, Medalie and Qi, 2017)
- 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).
Official source