No health-based violations on EPA record since 2016.
Serves about 4,158 people (1,386 connections) with surface water bought from Rankin Road West MUD and Harris County MUD 217.
From EPA's record for TX1012941. PurityMap is independent of Harris County MUD 304.
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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 February 2024 to August 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| 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 | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-13 to 2024-08-06 | UCMR5 Analytical Results: HARRIS COUNTY MUD 304 (TX1012941) |
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 304's phone number on EPA record is 281-719-1990. Its mailing address is 24624 INTERSTATE 45 N STE 200, THE WOODLANDS, TX 77386-4084.
According to EPA's record, Harris County MUD 304 uses surface water bought from Rankin Road West MUD and Harris County MUD 217.
No health-based violations on EPA record since 2016. EPA also lists 5 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 304's latest lead and copper round, which ended in December 2023, was 4.22 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Harris County MUD 304. Its phone number on EPA record is 281-719-1990. Its mailing address on EPA record is 24624 INTERSTATE 45 N STE 200, THE WOODLANDS, TX 77386-4084. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.