Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
11
health-based violations
11
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2004-10-01 → 2004-12-31 |
| MCL | Health-based | Resolved | 2004-10-01 → 2004-12-31 |
| MCL | Health-based | Resolved | 2004-04-01 → 2004-06-30 |
| MCL | Health-based | Resolved | 2004-04-01 → 2004-06-30 |
| MCL | Health-based | Resolved | 2004-03-01 → 2004-06-30 |
| MCL | Health-based | Resolved | 2004-03-01 → 2004-06-30 |
| MCL | Health-based | Resolved | 2004-01-01 → 2004-03-31 |
| MCL | Health-based | Resolved | 2004-01-01 → 2004-03-31 |
| MCL | Health-based | Resolved | 2003-01-01 → 2003-12-31 |
| MCL | Health-based | Resolved | 2003-01-01 → 2003-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 236.8 µg/L 18% of the EPA limit 1300 µg/L
worst single sample: 350 µg/L | 53/61 | SYR4 | 2012–2018 |
| Lead | 2.72 µg/L 18% of the EPA limit 15 µg/L
worst single sample: 5.18 µg/L | 16/61 | SYR4 | 2012–2018 |
| Nitrate | 970 µg/L 9.7% of the EPA limit 10000 µg/L | 16/16 | SYR4 | 2012–2019 |
| Bromodichloromethane | 10.975 µg/L No EPA limit set
worst single sample: 12.9 µg/L | 12/12 | SYR4 | 2013–2019 |
| Chloroform | 19.9 µg/L No EPA limit set
worst single sample: 21 µg/L | 12/12 | SYR4 | 2013–2019 |
| Dibromochloromethane | 4.42 µg/L No EPA limit set
worst single sample: 5.3 µg/L | 12/12 | SYR4 | 2013–2019 |
| Lead | 0.00060 mg/L 4% of the EPA limit 0.0150 mg/L | 10/10 | LCR | 2024 |
| Atrazine | 0.3795 µg/L 13% of the EPA limit 3 µg/L
worst single sample: 0.3900 µg/L | 8/8 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 24.57 µg/L No EPA limit set
worst single sample: 25.2 µg/L | 7/7 | SYR4 | 2013–2019 |
| TTHM | 34.7 µg/L 43% of the EPA limit 80 µg/L
worst single sample: 35.9 µg/L | 7/7 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 33.97 µg/L 57% of the EPA limit 60 µg/L
worst single sample: 35.2 µg/L | 7/7 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 6.74 µg/L No EPA limit set
worst single sample: 6.8 µg/L | 7/7 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 3.075 µg/L No EPA limit set
worst single sample: 3.2 µg/L | 6/7 | SYR4 | 2013–2019 |
| Simazine | 0.1780 µg/L 4.5% of the EPA limit 4 µg/L
worst single sample: 0.1900 µg/L | 5/8 | SYR4 | 2012–2019 |
| Fluoride | 397 µg/L 9.9% of the EPA limit 4000 µg/L
worst single sample: 400 µg/L | 3/3 | SYR4 | 2012–2018 |
| Nitrate-Nitrite | 824 µg/L 8.2% of the EPA limit 10000 µg/L
worst single sample: 850 µg/L | 3/3 | SYR4 | 2013–2019 |
| Barium | 98.21 µg/L 4.9% of the EPA limit 2000 µg/L
worst single sample: 99.2 µg/L | 2/2 | SYR4 | 2016–2019 |
| Bromoform | 1.095 µg/L No EPA limit set
worst single sample: 1.1 µg/L | 2/12 | SYR4 | 2013–2019 |
| Cyanide | 119.5 µg/L 60% of the EPA limit 200 µg/L
worst single sample: 120 µg/L | 2/2 | SYR4 | 2014–2017 |
| Nitrite | 19.5 µg/L 2% of the EPA limit 1000 µg/L
worst single sample: 20 µg/L | 2/3 | SYR4 | 2013–2019 |
| Combined Uranium | 1 µg/L 3.3% of the EPA limit 30 µg/L | 1/1 | SYR4 | 2015 |
| Gross Beta Particle Activity | 4.5 pCi/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Monochloroacetic Acid | 5.1 µg/L No EPA limit set | 1/7 | SYR4 | 2013–2019 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L | 1/2 | SYR4 | 2016–2019 |
| Lithium | 9.25 µg/L No EPA limit set | 1/4 | UCMR-5 | 2025 |
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Harris County Mud 127
Is Harris County Mud 127 tap water safe to drink?
EPA monitoring detected 27 contaminants in Harris County Mud 127's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Harris County Mud 127's water?
EPA monitoring detected Copper, Lead, Nitrate, Bromodichloromethane, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Harris County Mud 127 serve?
Harris County Mud 127 reports serving 5,247 people in Texas, per its EPA record.
Has Harris County Mud 127 had any water quality violations?
The EPA has 11 violations on file for Harris County Mud 127, of which 11 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.