Get your water tested in Mississippi.
The short answer
Mississippi’s list has 5 labs certified to test drinking water. One of the labs here is named for a water utility and may test only its own water, so it comes last.
Certification is test by test, so check that a lab is certified for what you want tested, and call first: it will say which bottles to use and how soon the sample has to arrive.
From the state
Mississippi State Department of Health
Bacteria testing for private wells: apply online, and the department takes a sample from your well and tests it. It does not test for minerals or chemicals. $10 plus a processing fee, invoiced by email.
Private Well Sample application, Mississippi State Department of Health, checked Oct. 10, 2026
Labs in Mississippi
4 labs, by city.
| Lab | City | Phone | Certified for |
|---|---|---|---|
| Bonner Analytical Testing, Inc. | Hattiesburg | (601) 264-2854 | Bacteria |
| Micro-Methods Laboratory | Ocean Springs | (228) 875-6420 | Bacteria |
| Huntington Ingalls, Inc | Pascagoula | Not listed | Bacteria |
| NASA Environmental Services | Stennis Space Center | (228) 688-2053 | Bacteria |
Labs run by water utilities
1 lab named for a water utility or its plant. A utility’s lab may test only its own system’s water, so call before taking a sample there.
| Lab | City | Phone | Certified for |
|---|---|---|---|
| City of Meridian Fresh Water Treatment Plant | Meridian | (601) 484-6836 | Bacteria |
What to ask a lab to test
- On a private well: no one else tests it. What to test a well for, and how often.
- On city water: your utility tests what leaves the plant, not what your own pipes add. Testing your tap for lead.
- What it costs: fees vary by lab and by test, and some states test wells for free. What a water test costs.
- Anything your utility’s report flags: a lab certified for that contaminant can test your own tap. Mississippi utilities’ reports.
Source: MSDH, water supply certification: in-state participating labs, dated Feb. 14, 2025, read Oct. 10, 2026. Labs are listed as the state lists them; what each is certified for is as far as the list says. Certifications change, so a lab’s own word is the latest.
A lab named for a water utility is listed apart. Distances on town pages are straight lines between ZIP code centers from the Census 2020 gazetteer. How labs are listed here.
Where to go next
- Testing a private wellWhat to test for every year, what else depends on where you live, and reading the results.How to test well water
- Mississippi utilitiesEvery utility with a full report: what its results show, and its violations.Mississippi tap water
- Labs in other statesEvery state TapBuff has read, and where to find the rest.Certified labs by state