No health-based violations on EPA record since 2016.
Serves about 10,404 people (3,468 connections) with surface water bought from Cypress Creek Utility District and North Harris County Regional Water Autho.
From EPA's record for TX1012740. PurityMap is independent of Harris County MUD 230.
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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 May 2023 to November 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorohexanoic acid (PFHxA) | 8.5 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoropentanoic acid (PFPeA) | 15 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| 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 | 2023-05-18 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-18 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-18 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-18 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-18 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-07-19 to 2023-11-15 | UCMR5 Analytical Results: HARRIS COUNTY MUD 230 (TX1012740) |
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 230'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 230 uses surface water bought from Cypress Creek Utility District and North Harris County Regional Water Autho.
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 230'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 230. 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.