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.
14
health-based violations
39
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-04-01 → 2013-06-30 |
| MCL | Health-based | Resolved | 2013-01-01 → 2013-03-31 |
| MCL | Health-based | Resolved | 2013-01-01 → 2013-03-31 |
| MCL | Health-based | Resolved | 2013-01-01 → 2013-03-31 |
| MCL | Health-based | Resolved | 2013-01-01 → 2013-03-31 |
| MCL | Health-based | Resolved | 2013-01-01 → 2013-03-31 |
| MCL | Health-based | Resolved | 2012-10-01 → 2012-12-31 |
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 | 212.8 µg/L 16% of the EPA limit 1300 µg/L
worst single sample: 244 µg/L | 47/64 | SYR4 | 2013–2019 |
| Bromodichloromethane | 14.225 µg/L No EPA limit set
worst single sample: 21.1 µg/L | 36/75 | SYR4 | 2012–2019 |
| TTHM | 49.78 µg/L 62% of the EPA limit 80 µg/L
worst single sample: 71.7 µg/L | 35/62 | SYR4 | 2012–2019 |
| Chloroform | 14.28 µg/L No EPA limit set
worst single sample: 16.3 µg/L | 33/75 | SYR4 | 2012–2019 |
| Dibromochloromethane | 16.02 µg/L No EPA limit set
worst single sample: 24.5 µg/L | 33/75 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 27.48 µg/L 46% of the EPA limit 60 µg/L
worst single sample: 37.8 µg/L | 33/62 | SYR4 | 2012–2019 |
| Bromoform | 9.44 µg/L No EPA limit set
worst single sample: 13 µg/L | 30/75 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 17.785 µg/L No EPA limit set
worst single sample: 20.3 µg/L | 30/62 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 6.98 µg/L No EPA limit set
worst single sample: 9.4 µg/L | 29/62 | SYR4 | 2012–2019 |
| Nitrate | 548.5 µg/L 5.5% of the EPA limit 10000 µg/L
worst single sample: 580 µg/L | 28/38 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 4.8 µg/L No EPA limit set
worst single sample: 5 µg/L | 21/62 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 5.36 pCi/L 107% of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 5.9 pCi/L | 19/19 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 10.7 pCi/L No EPA limit set | 19/19 | SYR4 | 2012–2019 |
| Combined Uranium | 8.625 µg/L 29% of the EPA limit 30 µg/L
worst single sample: 9.3 µg/L | 16/16 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 18.925 pCi/L 126% of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 22 pCi/L | 16/16 | SYR4 | 2012–2019 |
| Lead | 15.357 µg/L 102% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 29 µg/L | 15/64 | SYR4 | 2013–2019 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2025 |
| Nitrite | 840.5 µg/L 84% of the EPA limit 1000 µg/L
worst single sample: 890 µg/L | 12/36 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1014.5 µg/L 10% of the EPA limit 10000 µg/L
worst single sample: 1200 µg/L | 8/9 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 8.03 µg/L No EPA limit set
worst single sample: 8.6 µg/L | 7/62 | SYR4 | 2012–2019 |
| Atrazine | 0.1800 µg/L 6% of the EPA limit 3 µg/L
worst single sample: 0.1900 µg/L | 5/18 | SYR4 | 2012–2019 |
| Lithium | 24 µg/L No EPA limit set | 5/8 | UCMR-5 | 2024 |
| Barium | 220.15 µg/L 11% of the EPA limit 2000 µg/L
worst single sample: 223 µg/L | 4/4 | SYR4 | 2014–2017 |
| Fluoride | 1048 µg/L 26% of the EPA limit 4000 µg/L
worst single sample: 1120 µg/L | 4/4 | SYR4 | 2014–2017 |
| Arsenic | 4.4 µg/L 44% of the EPA limit 10 µg/L
worst single sample: 4.5 µg/L | 3/4 | SYR4 | 2014–2017 |
| Cyanide | 129.5 µg/L 65% of the EPA limit 200 µg/L
worst single sample: 130 µg/L | 2/4 | SYR4 | 2014–2017 |
| Selenium | 5.98 µg/L 12% of the EPA limit 50 µg/L
worst single sample: 6.1 µg/L | 2/4 | SYR4 | 2014–2017 |
| Simazine | 0.2410 µg/L 6% of the EPA limit 4 µg/L
worst single sample: 0.2500 µg/L | 2/18 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.4 µg/L 23% of the EPA limit 6 µg/L | 1/18 | SYR4 | 2012–2019 |
77 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, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Harris County Mud 23
Is Harris County Mud 23 tap water safe to drink?
EPA monitoring detected 32 contaminants in Harris County Mud 23'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 23's water?
EPA monitoring detected Copper, Bromodichloromethane, TTHM, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Harris County Mud 23 serve?
Harris County Mud 23 reports serving 3,170 people in Texas, per its EPA record.
Has Harris County Mud 23 had any water quality violations?
The EPA has 39 violations on file for Harris County Mud 23, of which 14 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.