No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting April 2024.
Serves about 9,480 people (2,879 connections) with groundwater from its own wells, and buys water from Harris County MUD 278 and Harris County MUD 106.
From EPA's record for TX1010617. PurityMap is independent of Trail of the Lakes MUD.
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6 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From April 2024 | Gross alpha particles | 37 pCi/L | 15 pCi/L | Archived |
| From April 2024 | Combined radium-226/228 | 8 pCi/L | 5 pCi/L | Archived |
| From January 2024 | Gross alpha particles | 27 pCi/L | 15 pCi/L | Archived |
| From January 2024 | Combined radium-226/228 | 6 pCi/L | 5 pCi/L | Archived |
| From October 2023 | Combined radium-226/228 | 6 pCi/L | 5 pCi/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From October 2023 | Gross alpha particles | 29 pCi/L | 15 pCi/L | Archived |
EPA required this system to test for 30 unregulated and emerging contaminants, from June 2023 to March 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 25.1 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 | 2023-06-13 to 2023-12-13 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| 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 | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-13 to 2024-03-18 | UCMR5 Analytical Results: TRAIL OF THE LAKES MUD (TX1010617) |
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 →Trail of the Lakes MUD's phone number on EPA record is 713-651-0111. Its mailing address is 9 GREENWAY PLZ STE 1000, HOUSTON, TX 77046-0900.
According to EPA's record, Trail of the Lakes MUD uses groundwater from its own wells, and buys water from Harris County MUD 278 and Harris County MUD 106.
EPA's record shows 6 health-based violations for Trail of the Lakes MUD in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting April 2024. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Trail of the Lakes MUD's latest lead and copper round, which ended in December 2024, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Trail of the Lakes MUD. Its phone number on EPA record is 713-651-0111. Its mailing address on EPA record is 9 GREENWAY PLZ STE 1000, HOUSTON, TX 77046-0900. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.