No health-based violations on EPA record since 2016.
Serves about 5,115 people (1,726 connections) with surface water bought from Harris County MUD 130, Harris County MUD 162 and West Harris County Regional Water Author.
From EPA's record for TX1011848. PurityMap is independent of Harris County MUD 179.
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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 2024 to October 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 9.35 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorohexanesulfonic acid (PFHxS) | 3.1 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorohexanoic acid (PFHxA) | 5.6 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorobutanoic acid (PFBA) | 7.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoropentanoic acid (PFPeA) | 6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| 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 | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-17 to 2024-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 179 (TX1011848) |
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 179's phone number on EPA record is 281-413-5132. Its mailing address is 609 MAIN ST FL 40, HOUSTON, TX 77002-3167.
According to EPA's record, Harris County MUD 179 uses surface water bought from Harris County MUD 130, Harris County MUD 162 and West Harris County Regional Water Author.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Harris County MUD 179's latest lead and copper round, which ended in December 2025, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Harris County MUD 179. Its phone number on EPA record is 281-413-5132. Its mailing address on EPA record is 609 MAIN ST FL 40, HOUSTON, TX 77002-3167. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.