Get your water tested in Louisiana.
The labs Louisiana certifies to test drinking water, from the state’s own list of Feb. 12, 2026. A lab test is the only way to know what is in your own tap or well.
The short answer
Louisiana’s list has 48 labs certified to test drinking water: 20 in Louisiana and 28 in other states. It also names one water utility’s in-house lab, left out here because it tests only its own system’s water. 10 of the labs here are named for a water utility and may test only its own water, so they come 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.
Labs in Louisiana
10 labs, by city.
| Lab | City | Phone | Certified for |
|---|---|---|---|
| LDH Rapides Regional Laboratory | Alexandria | (318) 487-5282 | Bacteria |
| LDH Amite Regional Laboratory | Amite | (985) 748-2011 | Bacteria |
| LDH Central Laboratory | Baton Rouge | (225) 219-5200 | Bacteria |
| Water Test, Inc. | Covington | (985) 892-8329 | Bacteria |
| JRTC & Fort Johnson Environmental Laboratory | Fort Polk | (337) 531-9128 | Bacteria |
| Element Materials Technology Lafayette, LLC | Lafayette | Not listed | Lead and copper, metals |
| LDH Lake Charles Regional Laboratory | Lake Charles | (337) 475-3236 | Bacteria |
| Curtis Environmental Services, Inc. | LaPlace | Not listed | Minerals and other inorganics, disinfection byproducts |
| SGS North America, Inc. - Scott | Scott | Not listed | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts |
| LDH Shreveport Regional Laboratory | Shreveport | (318) 676-7809 | Bacteria |
Labs in other states
28 labs Louisiana certifies outside the state, by state and city. Ask whether a lab takes samples by mail, and how fast they have to arrive.
| Lab | City | Certified for |
|---|---|---|
| Eurofins Pomona | Pomona, CA | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity |
| SGS North America Inc. - Wheat Ridge | Wheat Ridge, CO | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity |
| Eurofins Orlando | Altamonte Springs, FL | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts |
| SGS North America, Inc. - Orlando | Orlando, FL | Organic chemicals, PFAS |
| Pace Analytical Services, LLC - Ormond Beach FL | Ormond Beach, FL | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity |
| Eurofins Pensacola | Pensacola, FL | Nitrate, minerals and other inorganics |
| American Water Central Laboratory | Belleville, IL | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity |
| Element Materials Technology Fort Wayne, LLC | Fort Wayne, IN | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS |
| Eurofins South Bend | South Bend, IN | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity |
| Pace Analytical Services, LLC - Madisonville | Madisonville, KY | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts |
| Pace Analytical Services, LLC - East Longmeadow, MA | East Longmeadow, MA | Organic chemicals, PFAS |
| Pace Analytical Services, LLC - Woburn | Woburn, MA | Asbestos |
| National Testing Laboratories, Ltd. | Ypsilanti, MI | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity |
| Pace Analytical Services, LLC - Minneapolis MN | Minneapolis, MN | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals |
| EMSL Analytical, Inc. - New Hope | New Hope, MN | Asbestos |
| Eurofins St. Louis | Earth City, MO | Radioactivity |
| Eurofins Built Environment Testing East - Cary | Cary, NC | Asbestos |
| Pace Analytical Services, LLC - Huntersville, NC | Huntersville, NC | Disinfection byproducts |
| SGS North America Inc. - Wilmington | Wilmington, NC | Organic chemicals, PFAS |
| EMSL Analytical, Inc. - Cinnaminson | Cinnaminson, NJ | Lead and copper, metals, minerals and other inorganics, organic chemicals, PFAS, radioactivity, asbestos |
| Pace Analytical Services, LLC - Greensburg | Greensburg, PA | Radioactivity |
| GEL Laboratories, LLC | Charleston, SC | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, PFAS, radioactivity |
| Eurofins Knoxville | Knoxville, TN | Organic chemicals |
| Waypoint Analytical, LLC | Memphis, TN | Lead and copper, metals |
| Pace Analytical National Center for Testing & Innovation | Mt. Juliet, TN | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity |
| ALS Group USA Corp | Houston, TX | Organic chemicals |
| SPL, Inc. Kilgore | Kilgore, TX | Nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS |
| Environmental Hazard Services, LLC | North Chesterfield, VA | Lead and copper, metals |
Labs run by water utilities
10 labs 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 Alexandria Water Laboratory | Alexandria | (318) 441-6251 | Bacteria |
| Baton Rouge Water Company Laboratory | Baton Rouge | (225) 952-7638 | Bacteria |
| St. Bernard Parish Water Lab | Chalmette | (504) 217-1681 | Bacteria |
| Terrebonne Parish Consolidated Waterworks District #1 Laboratory | Houma | (985) 446-7509 | Bacteria |
| Lafayette Utilities Systems Water Production Laboratory | Lafayette | (337) 291-5913 | Bacteria |
| City of Lake Charles Water Laboratory | Lake Charles | (337) 491-1599 | Bacteria |
| City of Marksville Water Laboratory | Marksville | (318) 442-4000 | Bacteria |
| Louisiana Water Company | New Iberia | (337) 374-1073 | Bacteria |
| Sewerage & Water Board Of New Orleans | New Orleans | (504) 865-0420 | Bacteria |
| City of Shreveport T.L. Amiss Laboratory | Shreveport | (318) 673-7654 | 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. Louisiana utilities’ reports.
Source: LDH, laboratories certified by Louisiana for drinking water analysis, dated Feb. 12, 2026, read Oct. 16, 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
- Louisiana utilitiesEvery utility with a full report: what its results show, and its violations.Louisiana tap water
- Labs in other statesEvery state TapBuff has read, and where to find the rest.Certified labs by state