No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting August 2022.
Serves about 14,796 people (4,734 connections) with surface water bought from Cypress Klein Utility District Wimbleton, Northwest Harris County MUD 30, Spring Creek Forest PUD and 1 more.
From EPA's record for TX1010572. PurityMap is independent of Harris County MUD 24.
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1 health-based violation in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From August 2022 | E. coli | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 41.5 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorohexanoic acid (PFHxA) | 3.4 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorobutanoic acid (PFBA) | 6.7 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoropentanoic acid (PFPeA) | 4.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-10 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-10 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| 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 | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-10 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-10 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-07 to 2025-10-16 | UCMR5 Analytical Results: HARRIS COUNTY MUD 24 (TX1010572) |
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 24's phone number on EPA record is 713-864-5466. Its mailing address is 1155 DAIRY ASHFORD RD STE 875, HOUSTON, TX 77079-3034.
According to EPA's record, Harris County MUD 24 uses surface water bought from Cypress Klein Utility District Wimbleton, Northwest Harris County MUD 30, Spring Creek Forest PUD and 1 more.
EPA's record shows 1 health-based violation for Harris County MUD 24 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 August 2022. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Harris County MUD 24's latest lead and copper round, which ended in December 2024, was 2.42 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Harris County MUD 24. Its phone number on EPA record is 713-864-5466. Its mailing address on EPA record is 1155 DAIRY ASHFORD RD STE 875, HOUSTON, TX 77079-3034. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.