No health-based violations on EPA record since 2016.
Serves about 6,717 people (1,778 connections) with surface water bought from Northwest Harris County MUD 9 and North Harris County Regional Water Autho.
From EPA's record for TX1011107. PurityMap is independent of Mills Road MUD.
Are you this utility? Correct this listing →
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 2023 to August 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 37.8 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoropentanoic acid (PFPeA) | 3.7 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| 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 | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-07 | UCMR5 Analytical Results: MILLS ROAD MUD (TX1011107) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
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 →Mills Road MUD's phone number on EPA record is 281-376-8802. Its mailing address is 9 GREENWAY PLZ STE 1100, HOUSTON, TX 77046-0905.
According to EPA's record, Mills Road MUD uses surface water bought from Northwest Harris County MUD 9 and North Harris County Regional Water Autho.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Mills Road MUD's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Mills Road MUD. Its phone number on EPA record is 281-376-8802. Its mailing address on EPA record is 9 GREENWAY PLZ STE 1100, HOUSTON, TX 77046-0905. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.