7 named for radon in water itself on the list.
Per the state list or a state web page. Call to confirm.
Located outside Louisiana but on its list.
USGS estimate for Louisiana.
How many labs test for radon in water in Louisiana
7 labs on Louisiana's official drinking-water lab list are certified to test for radon in water. All 7 are named for radon in water on the list. 7 of them are marked as taking samples from the public. They are listed first. 7 are located outside Louisiana.
The list is published by the Louisiana Department of Health (LDH), Office of Public Health - Laboratory Certification Program (Safe Drinking Water). List version on file: Current as of 2/12/2026. Fetched 2026-11-15 (UTC).
Louisiana labs certified for radon in water
Marked as taking public samples (7)
| Lab | Location | Radon in water certification | Public samples | Cert. expiry |
|---|---|---|---|---|
| EMSL Analytical, Inc. - Cinnaminson | Cinnaminson, NJ | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Eurofins Pomona | Pomona, CA | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Eurofins South Bend | South Bend, IN | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Eurofins St. Louis | Earth City, MO | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| GEL Laboratories, LLC | Charleston, SC | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Pace Analytical National Center for Testing & Innovation | Mt. Juliet, TN | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
| Pace Analytical Services, LLC - Greensburg | Greensburg, PA | Named on the official list | Public samples: yes (per state) | 12/31/2026 |
How the Louisiana list marks public samples (whole list). LDH's chemistry list prints 'Accepts Commercial Samples: Yes/No' for each lab. 'Yes' means the lab accepts commercial samples, which is broader than 'homeowner', so call before you send a sample. The microbiology list does not say.
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 radon in water in Louisiana
Most of the risk from radon in a well comes from breathing the gas the water releases indoors, not from drinking it. Read our radon in water explainer.
EPA's radon zone map puts 0 of Louisiana's 64 parishes in Zone 1 (highest potential), 0 in Zone 2 and 64 in Zone 3. [1] That map is about radon in indoor air, and EPA says it should not be used to decide whether an individual home needs testing. If radon is found in your air and you have a well, EPA suggests testing the water too.
About 491,582 people in Louisiana 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: Louisiana.
Other tests in Louisiana
- U.S. EPA, Map of Radon Zones, county list (EPA 402/A-16/001, spreadsheet Sep 2025)
- USGS, Estimated use of water in the United States, county-level data for 2015 (Dieter et al., ver. 2.0, 2018)
- LDH - 2026 List of Laboratories Certified by Louisiana for Drinking Water Analyses - Chemistry (official list)
LDH - 2026 List of Laboratories Certified by Louisiana for Drinking Water Analyses - Chemistry.
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