No health-based violations on EPA record since 2016.
Serves about 14,268 people (4,756 connections) with surface water bought from Harris County FWSD 51 and North Channel Water Authority.
From EPA's record for TX1012677. PurityMap is independent of Harris County MUD 285.
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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 September 2023 to May 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanesulfonic acid (PFHxS) | 4 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorobutanesulfonic acid (PFBS) | 4.3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorohexanoic acid (PFHxA) | 7.2 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorobutanoic acid (PFBA) | 7.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoropentanoic acid (PFPeA) | 8.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 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 | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 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 | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 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 | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 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 | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| 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 | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-09-15 to 2025-01-24 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-15 to 2025-01-24 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-15 to 2025-01-24 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-15 to 2025-01-24 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-15 to 2025-01-24 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-12-14 to 2025-05-14 | UCMR5 Analytical Results: HARRIS COUNTY MUD 285 (TX1012677) |
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 →Harris County MUD 285's phone number on EPA record is 713-860-6400. Its mailing address is 3200 SOUTHWEST FWY STE 2600, HOUSTON, TX 77027-7537.
According to EPA's record, Harris County MUD 285 uses surface water bought from Harris County FWSD 51 and North Channel Water Authority.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Harris County MUD 285's latest lead and copper round, which ended in December 2024. The federal action level is 15 µg/L.
PurityMap has no verified website for Harris County MUD 285. Its phone number on EPA record is 713-860-6400. Its mailing address on EPA record is 3200 SOUTHWEST FWY STE 2600, HOUSTON, TX 77027-7537. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.