At a glance
- What it is certified to test
- 1 of the 9 common well tests on the MT 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
- not stated: ask the lab
Lab facts
- Listed by
- Montana (Montana Department of Public Health and Human Services (DPHHS) - Laboratory Services, Water Laboratory Certification Program)
- Address
- 1775 East Loop 336, Suite 4, Conroe, TX 77301 · Open in Google Maps
- Phone
- (936) 756-5333
- Certificate
- The Montana DPHHS Water Laboratory Certification Program - Certified Laboratories (version page as fetched 2026-11-15 (no date printed)) prints no certificate ID or expiry date for this lab.
- Public / homeowner samples
- Public samples: ask the labNot stated in the list.
- Location note
- Lab is in TX, certified by Montana (often used as a mail-in lab).
- Left blank on the list
- The Montana list (version page as fetched 2026-11-15 (no date printed)) gives no website for this lab.
Tests on the state list
| Contaminant | On this state list | Same lab, other state lists |
|---|---|---|
| Coliform / E. coli | Group-level certification | Arizona, Illinois, Pennsylvania, South Carolina, Texas |
| Nitrate | Not named on this list | |
| Arsenic | Not named on this list | |
| Lead | Not named on this list | |
| PFAS | Not named on this list | |
| Uranium | Not named on this list | |
| Radon (water) | Not named on this list | |
| Manganese | Not named on this list | |
| VOCs | Not named on this list |
Groups as written on the state list (1)
- Microbiology
- 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*').
DPHHS lists this lab under: Microbiology (Out-of-State Laboratories). The page names no analytes, certificate number or expiry date. Microbiology: the program page says DPHHS certifies labs that analyze Montana's public drinking water supplies for "chemical and microbiological contaminants" under the Safe Drinking Water Act, where the microbiological drinking-water tests are total coliform / E. coli; the page names no organism or method, so bacteria is shown as a certified group, not a named test. Ask the lab which coliform test it runs.
Also certified by other states
Same business (same street address and ZIP) on another state's official list. Each state certifies separately, so each listing keeps its own source.
- Pennsylvania · PA DEP 68-00582 · Coliform / E. coli · Public samples: ask the labPA DEP Accredited Labs Report - Drinking Water (chemistry + microbiology) (STALE - report dated 6/11/2024)
- Illinois · IDPH Lab # 17591 · Coliform / E. coli · Public samples: ask the labIllinois Department of Public Health - Certified Water Microbiology Laboratories (Revision Date Thursday, December 4, 2025)
- Florida · FL DOH E871139 · analytes not broken down · Public samples: ask the labFlorida DOH - Laboratories Certified Under NELAP (DEP Qlik app): Analyte Search + Organization Name and Location Search, Matrix = Drinking Water, Certification Status = Accredited, Active labs (DOH Version: 11/07/2026 08:30:01 (Qlik app refresh 11/9/2026 4:26:47 AM; live database))
- Texas · TX Lab ID T104704289 · Coliform / E. coli · Public samples: ask the labTCEQ Laboratory Approval Status - List of Accredited Laboratories (public database, Matrix: Drinking Water) (Live database, searched 2026-11-15 ("accurate as of the date and time of the search"))
- Maryland · 304 · analytes not broken down · Public samples: ask the labMaryland's Certified Drinking Water Laboratories (MDE Laboratory Certification Program) (Latest Revisions: 10/1/2026)
- Arizona · AZ0823 · Coliform / E. coli · Public samples: ask the labADHS Safe Drinking Water Commercial Lab List (List of Arizona Certified Commercial Drinking Water Laboratories) (current as of Saturday, November 7, 2026)
- South Carolina · 82016001 · Coliform / E. coli · Public samples: ask the labSCDES Commercial Environmental Laboratory Mapping (CELMAPP) - certified commercial laboratories, Safe Drinking Water (no date printed; CELMAPP data last refreshed 2026-10-10 (LastRefreshDate of SCDES's details table))
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 Montana 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).
Montana DPHHS Water Laboratory Certification Program - Certified Laboratories. Fetched 2026-11-15 (UTC). File SHA-256 81a2798702cb…
Open the official source list