No health-based violations on EPA record since 2016.
Serves about 6,726 people (2,242 connections) with groundwater from its own wells, and buys water from Harris County MUD 65 and West Harris County MUD 5.
From EPA's record for TX1011513. PurityMap is independent of Harris County MUD 64.
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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 June 2024 to December 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 33.6 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| 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 | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-28 to 2024-12-17 | UCMR5 Analytical Results: HARRIS COUNTY MUD 64 (TX1011513) |
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 64's phone number on EPA record is 713-652-6500. Its mailing address is 2727 ALLEN PKWY STE 1100, HOUSTON, TX 77019-2191.
According to EPA's record, Harris County MUD 64 uses groundwater from its own wells, and buys water from Harris County MUD 65 and West Harris County MUD 5.
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 64's latest lead and copper round, which ended in December 2024, was 1.62 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Harris County MUD 64. Its phone number on EPA record is 713-652-6500. Its mailing address on EPA record is 2727 ALLEN PKWY STE 1100, HOUSTON, TX 77019-2191. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.