No health-based violations on EPA record since 2016.
Serves about 4,284 people (1,416 connections) with surface water bought from SJRA the Woodlands.
From EPA's record for TX1700332. PurityMap is independent of Montgomery County MUD 39.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 23.8 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2025-01-16 to 2025-10-16 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-16 to 2025-07-17 | UCMR5 Analytical Results: MONTGOMERY COUNTY MUD 39 (TX1700332) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Montgomery County MUD 39's phone number on EPA record is 281-367-1271. Its mailing address is 2455 LAKE ROBBINS DR, THE WOODLANDS, TX 77380-1025.
According to EPA's record, Montgomery County MUD 39 uses surface water bought from SJRA the Woodlands.
No health-based violations on EPA record since 2016. EPA also lists 4 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Montgomery County MUD 39's latest lead and copper round, which ended in December 2025, was 0.634 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Montgomery County MUD 39. Its phone number on EPA record is 281-367-1271. Its mailing address on EPA record is 2455 LAKE ROBBINS DR, THE WOODLANDS, TX 77380-1025. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.