Certified Lab Directory
Certified Water Testing Labs in Tennessee
Not every lab that will take your money is approved to test drinking water. In Tennessee, that approval comes from the Tennessee Department of Environment and Conservation (TDEC) — and it requires EPA-approved methods, annual proficiency tests, and on-site audits. Below are the 13 labs based in Tennessee that currently hold it. If you're testing a private well, the EPA recommends doing this once a year, so it's worth finding one you like.
Certified drinking water labs in Tennessee
| Lab | City | Phone |
|---|---|---|
| BNH AEDC Chemistry Lab (Arnold AFB) | Arnold Air Force Base | 931-454-7340 |
| NAS Arnold AFB WTP (Old ATA) Micro Lab | Arnold Air Force Base | 931-454-5565 |
| AIRL, Inc. | Cleveland | 423-476-7766 |
| Tennessee Tech University Water Center | Cookeville | 931-372-3538 |
| Waypoint Analytical, LLC (Jackson) | Jackson | 731-423-5330 |
| Eurofins Knoxville | Knoxville | 865-291-3000 |
| Microbac - Knoxville Division | Maryville | 865-977-1200 |
| Microbac Laboratories, Inc - Nashville | Maryville | 615-242-1480 |
| Waypoint Analytical, LLC (Memphis) | Memphis | 901-213-2400 |
| Pace Analytical National Center for Testing & Evaluation | Mount Juliet | 615-758-5858 |
| Assured Bio Labs, LLC | Oak Ridge | 865-813-1700 |
| DOE Y-12 CNS National Security Complex | Oak Ridge | 865-576-3099 |
| Eberline Analytical Oak Ridge | Oak Ridge | 865-481-0683 |
Certification status changes — labs are added, dropped, and suspended throughout the year. Before you mail a sample, confirm the lab still holds certification for the specific test you need. This list was pulled from the official source on .
This table covers the 13 certified labs located in Tennessee. The Tennessee Department of Environment and Conservation (TDEC) also certifies 26 labs based outside the state, which can often still run your sample — those are on the official list linked below.
Source: Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources, Laboratory Certification Program (Laboratories Certified for Drinking Water Analyses) (PDF). List dated March 17, 2026; retrieved . (https://www.tn.gov/content/dam/tn/environment/water/drinking-water-unit/wr_wq_dw_certified-commercial-labs.pdf)
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Get the Free Test KitHow lab certification works in Tennessee
In Tennessee, drinking water laboratories are certified by the Tennessee Department of Environment and Conservation (TDEC) under the Laboratory Certification Program (Laboratories Certified for Drinking Water Analyses). The program operates within the EPA's national framework for drinking water lab certification: labs must use EPA-approved analytical methods, successfully analyze proficiency-test samples at least annually for each certified method and analyte, and pass periodic on-site audits (EPA, epa.gov/dwlabcert). Certification is issued per method and per analyte — so a lab certified for bacteria testing isn't automatically certified for metals or radiochemistry. When you call, name the specific test you need.
TDEC publishes a second list of labs certified for microbiological analyses — mostly utility-owned labs — that isn't included here. If you need bacteria testing and don't see a fit above, check that list on the state source.
Questions about a lab's certification status go to the program directly: (615) 532-0191.
Common questions about Tennessee water testing labs
Who certifies water testing labs in Tennessee?
The Tennessee Department of Environment and Conservation (TDEC), through the Laboratory Certification Program (Laboratories Certified for Drinking Water Analyses). The program follows the EPA's national framework for drinking water laboratory certification, which requires EPA-approved test methods, at least annual proficiency testing, and periodic on-site audits. Source: Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources (https://www.tn.gov/content/dam/tn/environment/water/drinking-water-unit/wr_wq_dw_certified-commercial-labs.pdf) and EPA (epa.gov/dwlabcert).
How many certified labs are in Tennessee?
13 certified drinking water labs are located in Tennessee, as of the official list we pulled on August 2, 2026. The Tennessee Department of Environment and Conservation (TDEC) also certifies 26 labs based outside Tennessee that can often still analyze your sample; those appear on the official list linked on this page. Certification changes throughout the year, so treat this as a starting point and confirm status with the lab. Source: Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources (https://www.tn.gov/content/dam/tn/environment/water/drinking-water-unit/wr_wq_dw_certified-commercial-labs.pdf).
How often should I test my well water in Tennessee?
The EPA recommends testing private wells annually for total coliform bacteria, nitrates, total dissolved solids, and pH — and testing immediately after flooding, well repairs, nearby construction, or any change in your water's taste, odor, or color. Your local health department can tell you which contaminants are common in Tennessee groundwater. Source: EPA, Protect Your Home's Water (epa.gov/privatewells).
Can I use a lab that isn't on this list?
This list covers labs located in Tennessee that were on the official list published by the Tennessee Department of Environment and Conservation (TDEC) as of August 2, 2026. Certification changes during the year, so a lab missing from this page may have been certified since then — the official source linked above always has the current list and it also includes certified labs based outside the state. What we'd avoid is any lab that can't show a current drinking water certification at all. The EPA's guidance is to only use certified laboratories for drinking water testing. Source: EPA, Protect Your Home's Water (epa.gov/privatewells).
What if the nearest certified lab is far from me?
Ask the lab about a mail-in collection kit — many certified labs ship one with instructions and pre-treated bottles. Timing matters for some tests (bacteria samples have a short window between collection and analysis), so follow the lab's collection instructions exactly. Your local health department is also worth a call; some offer private well testing for free. Source on health department testing: EPA, Protect Your Home's Water (epa.gov/privatewells).
Lab results came back with a problem?
High hardness, high TDS, or a contaminant above EPA limits can usually be treated at the house. Send us what the lab found and we'll build a filtration estimate around your report.
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