About this list
- Agency
- Mississippi State Department of Health (MSDH) - Public Health Laboratory, Water Supply Laboratory Certification Program
- Format
- HTML list, in-state labs only: EPA lab ID and certification category (Chemistry, Microbiology) per lab; no analytes, no expiry
- Homeowner flag
- Not stated per lab. MSDH's Private Well Water Testing page: "The Mississippi State Department of Health tests private wells for bacteriological contamination only. Testing for mineral content, chemicals or other contaminants should be done through a private laboratory." It links this list as "Private water testing laboratories participating in MSDH's Drinking Water Lab Certification Program". MSDH's own Public Health Laboratory, which is not on this list, tests private well water for bacteria (MSDH's online Private Well Testing Form).
Partial list. Only Mississippi's in-state certified labs are listed. MSDH also accepts out-of-state labs by reciprocity ("recognized certified laboratories located outside the state may conduct Water Supply analyses for Mississippi public water systems"); those labs are not on this list.
Water Supply Certification: In-State Labs (Participating Laboratories). Fetched 2026-11-15 (UTC).
Official sourceTesting your well in Mississippi
How often to test
- Mississippi State University Extension recommends testing private drinking water wells at least once a year. [1]
Free testing
We found no statewide free testing program in Mississippi. Ask your county health department whether it runs one.
Testing programs and help
- A Mississippi State Department of Health (MSDH) environmentalist can visit your well and take a sample, which the state lab in Jackson tests for total coliform. There is a fee; contact the MSDH Division of On-Site Wastewater. [1]
- Mississippi State University Extension's Mississippi Well Owner Network is another option for well owners who want water testing. [1]
State lab and rules
- MSDH tests private wells for bacteria only and takes applications online. For minerals, chemicals or other contaminants, it says to use a private lab. MSDH lists the in-state private labs that take part in its Drinking Water Lab Certification Program. [2]
Show the numbers
| Item | Value | Note |
|---|---|---|
| Zone 1 | 0 counties | |
| Zone 2 | 8 counties | |
| Zone 3 | 74 counties |
Radon in indoor air, not in water. EPA: Zone 1 = highest potential (average indoor radon may be above 4 pCi/L); Zone 2 = 2 to 4; Zone 3 = below 2. EPA says the map should not be used to decide whether an individual home needs testing. Source: U.S. EPA, Map of Radon Zones, county list (EPA 402/A-16/001, spreadsheet Sep 2025), accessed 2026-11-01.
- Mississippi State University Extension, Publication 3813, Testing residential private well drinking water and understanding bacteriological analyses (POD-08-25)
- Mississippi State Department of Health, Private well water testing
- U.S. EPA, Map of Radon Zones, county list (EPA 402/A-16/001, spreadsheet Sep 2025)
Loan test (FHA, VA, USDA) in Mississippi
- VA. Test results are valid for 90 days from the date the local health authority certifies them, unless the local authority says otherwise. VA’s chapter names no list of contaminants: the water must meet the local health authority’s requirements, or EPA guidelines where it has none. Your lender may ask for specific tests.
- FHA. A well test is required in the situations FHA’s handbook lists, among others, and the report may not be more than 180 days old at disbursement.
- USDA. Guaranteed loans need a water quality test for a private well, done by the local health authority or a state-certified lab, and no more than 180 days old at closing.
Lenders can ask for more (extra tests, a particular lab, who takes the sample): ask your lender before you book. Federal rules as read on Nov 3, 2026 source 1 source 2 source 3. Full comparison: VA, FHA and USDA well water test requirements. Loan test kits sold by mail, with price and days to results: kits compared.
What Mississippi labs say on their own websites
State lists say what a lab is certified for, not whether it takes your sample or what it costs. We read each lab’s own site; a second reader re-checked every fact below. 1 labs on this list are on our register so far; 1 say they take homeowner samples and 0 print a price.
Say they take homeowner samples: Bonner Analytical Testing, Inc..
Prices exactly as each lab prints them, read 15 Nov 2026; re-checked every 90 days. Labs not shown have not been read yet or print nothing for homeowners. Confirm price and turnaround with the lab.
Well water by county
Private-well population (USGS, 2015), arsenic estimate, radon zone and nearby labs for each county with at least 1,000 people on private wells, largest first.