Water Test, Inc.

At a glance

What it is certified to test

1 of the 9 common well tests on the LA list (see which)

Price

not published on the state list: ask the lab for a quote

Turnaround

not stated on the state list or the lab’s website: ask when you order

Homeowner samples

yes (Louisiana list)

Lab facts

Listed by

Louisiana (Louisiana Department of Health (LDH), Office of Public Health - Laboratory Certification Program (Safe Drinking Water))

Address

21220 Highway 36, Covington, LA 70433 · Open in Google Maps

Phone

(985) 892-8329

Public / homeowner samples

Public samples: yes (per state)

LDH microbiology list marks this lab's certification '(PRIVATE WELLS ONLY)'

Left blank on the list

The Louisiana list (version March 2026) gives no website for this lab.

Certification record

Issued by

Louisiana Department of Health (LDH), Office of Public Health - Laboratory Certification Program (Safe Drinking Water) (certification program)

Expiry on the list

August 2026 · Date on list has passed (76 days ago)

List version

LDH - List of Laboratories Certified by Louisiana for Drinking Water Analysis - Microbiology, version March 2026

We fetched it

15 Nov 2026 (file SHA-256 9666bb1b07e4…) · open the state file

Tests on the state list

• Named on the official list The state list names this analyte (or a column for it) for this lab.
• Group-level certification Certified for a parent group (e.g. 'Inorganics') that includes this analyte. Confirm the specific test with the lab.
• Partial group certification The list marks the group as 'Partial'. Confirm this analyte with the lab.
• Subcontracted The lab sends this analyte to another accredited lab (MDH 'X*').

LDH's microbiology list names the coliform / E. coli methods this lab is certified for. LDH's microbiology list marks this lab's certification '(PRIVATE WELLS ONLY)'. The microbiology expiry printed on LDH's list (August 2026) had passed when we fetched the list; check the lab's current status with LDH (225-219-5200).

Nearest labs that take homeowner samples

No other lab that takes homeowner samples is within 25 miles of this lab; the nearest is 34 miles away. Distances are straight-line from the address on the state list (approx. = ZIP-code centre). “Takes homeowner samples” comes from a state list column or the lab’s own website, as named.

Price and turnaround as printed on each lab’s own website and checked by a second reader; – = not published or not read yet.

Around this lab: St. Tammany Parish, LA

• Private wells: about 66,008 people, 26% of St. Tammany Parish’s 250,088 residents (USGS, 2015); rank 1 of 64 counties in Louisiana by people on wells.

• EPA radon zone (indoor air): Zone 3: low potential (average indoor radon may be less than 2 pCi/L). EPA says the zone map should not decide whether one home needs testing.
• Arsenic above 10 µg/L (USGS model): about 1,127 private-well users (95% range 764 to 1,677; 2010 base), rank 1 of 64 in the state. A screening estimate, not a measurement of any well.
• Older homes (Census ACS 2020–2024): 21% of 113,911 housing units were built before 1980, below the state share of 46%. Homes built before 1986 are more likely to have lead solder or fittings, so test tap water for lead there.
• PFAS in public water nearby (public supply, not your well): 19 public systems serving this county reported EPA UCMR 5 results; 0 had a PFOA or PFOS sample at or above 4.0 ng/L.

County figures describe where the lab is, not the lab. Sources: USGS 2015 water use and 2017 arsenic estimates, EPA radon zones, Census ACS table B25034 (2020–2024), EPA UCMR 5 (2023–2026); details and links on the sources page.

Before you send a sample

Call the lab to confirm it's currently certified for the exact test and method, that it accepts samples from homeowners, and how to collect and ship them. Bacteria samples have short holding times. Status can change between list updates. To check a status, contact the Louisiana certification program.

Is this your lab?

Labs can ask for corrections through the agency that publishes their state list. Homeowner service, prices and turnaround above come only from the lab’s own website. To ask us to correct or remove this listing, write to us (how we handle listings).