At a glance
- What it is certified to test
- 1 of the 9 common well tests on the IL 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
- Illinois (Illinois EPA - Environmental Laboratory Accreditation Program (IL ELAP, chemistry) and Illinois Department of Public Health (IDPH, water microbiology))
- Address
- 1775 N. Loop 336, East Suite 4, Conroe, TX 77301 · Open in Google Maps
- Phone
- (936) 756-5333
- Public / homeowner samples
- Public samples: ask the labNot stated in the list.
- Location note
- Lab is in TX, certified by Illinois (often used as a mail-in lab).
- Left blank on the list
- The Illinois list (version Revision Date Thursday, December 4, 2025) gives no website for this lab.
Certification record
- Certificate ID
- IDPH Lab # 17591
- Issued by
- Illinois EPA - Environmental Laboratory Accreditation Program (IL ELAP, chemistry) and Illinois Department of Public Health (IDPH, water microbiology) (certification program)
- Expiry on the list
- May 2026 · Date on list has passed (168 days ago)
- List version
- Illinois Department of Public Health - Certified Water Microbiology Laboratories, version Revision Date Thursday, December 4, 2025
- We fetched it
- 15 Nov 2026 (file SHA-256 ff3504484187…) · open the state file
Tests on the state list
| Contaminant | On this state list | Same lab, other state lists |
|---|---|---|
| Coliform / E. coli | Named on the official list | Arizona, Montana, 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)
- Colilert 18 P/A: Total Coliform and E. coli (Chromogenic Substrate Method)
- 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*').
IDPH certifies this lab for these water microbiology methods: Colilert 18 P/A. IDPH lab type: Commercial. IDPH marks it as an out-of-state laboratory approved by reciprocity. The microbiology expiry month printed on IDPH's list (May 2026) has passed (checked Nov 15, 2026). Check the lab's current status with IDPH.
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)
- 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)
- Montana · no ID on list · Coliform / E. coli · Public samples: ask the labMontana DPHHS Water Laboratory Certification Program - Certified Laboratories (page as fetched 2026-11-15 (no date printed))
- 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 Illinois 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).
Illinois Department of Public Health - Certified Water Microbiology Laboratories. Fetched 2026-11-15 (UTC). File SHA-256 ff3504484187…
Open the official source list