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.
0
health-based violations
26
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| MR | Monitoring | Resolved | 2021-01-01 → 2021-03-31 |
| Other | Monitoring | Resolved | 2003-09-01 |
| MR | Monitoring | Resolved | 2003-07-01 → 2003-07-31 |
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 | 158.25 µg/L 12% of the EPA limit 1300 µg/L
worst single sample: 709 µg/L | 86/96 | SYR4 | 2012–2018 |
| Nitrate | 840 µg/L 8.4% of the EPA limit 10000 µg/L
worst single sample: 890 µg/L | 56/74 | SYR4 | 2012–2019 |
| Bromodichloromethane | 25.5 µg/L No EPA limit set
worst single sample: 48.7 µg/L | 26/51 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 36.56 µg/L 61% of the EPA limit 60 µg/L
worst single sample: 69.7 µg/L | 25/30 | SYR4 | 2013–2019 |
| Dibromochloromethane | 20.86 µg/L No EPA limit set
worst single sample: 26.6 µg/L | 24/51 | SYR4 | 2012–2019 |
| Bromoform | 13.785 µg/L No EPA limit set
worst single sample: 24.7 µg/L | 22/51 | SYR4 | 2012–2019 |
| Chloroform | 39.485 µg/L No EPA limit set
worst single sample: 77.1 µg/L | 22/51 | SYR4 | 2012–2019 |
| TTHM | 103.065 µg/L 129% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 164 µg/L | 22/30 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 19.62 µg/L No EPA limit set
worst single sample: 20.7 µg/L | 19/30 | SYR4 | 2013–2019 |
| Dichloroacetic Acid | 19.8 µg/L No EPA limit set
worst single sample: 30.9 µg/L | 16/30 | SYR4 | 2013–2019 |
| Fluoride | 1419.5 µg/L 35% of the EPA limit 4000 µg/L
worst single sample: 2050 µg/L | 14/15 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2023 |
| Lithium | 87.4 µg/L No EPA limit set | 10/10 | UCMR-5 | 2023 |
| Barium | 309.6 µg/L 15% of the EPA limit 2000 µg/L
worst single sample: 312 µg/L | 9/9 | SYR4 | 2014–2019 |
| Nitrate-Nitrite | 796 µg/L 8% of the EPA limit 10000 µg/L
worst single sample: 860 µg/L | 9/11 | SYR4 | 2012–2015 |
| Lead | 3.05 µg/L 20% of the EPA limit 15 µg/L
worst single sample: 3.5 µg/L | 7/96 | SYR4 | 2012–2018 |
| Trichloroacetic Acid | 6.92 µg/L No EPA limit set
worst single sample: 8.6 µg/L | 7/30 | SYR4 | 2013–2019 |
| Arsenic | 8.8 µg/L 88% of the EPA limit 10 µg/L
worst single sample: 9.7 µg/L | 4/9 | SYR4 | 2014–2019 |
| Atrazine | 0.3735 µg/L 12% of the EPA limit 3 µg/L
worst single sample: 0.3900 µg/L | 4/13 | SYR4 | 2012–2018 |
| Nitrite | 89.5 µg/L 9% of the EPA limit 1000 µg/L
worst single sample: 100 µg/L | 4/12 | SYR4 | 2012–2017 |
| Cyanide | 112 µg/L 56% of the EPA limit 200 µg/L
worst single sample: 120 µg/L | 3/9 | SYR4 | 2014–2019 |
| Monobromoacetic Acid | 2.19 µg/L No EPA limit set
worst single sample: 2.2 µg/L | 3/30 | SYR4 | 2013–2019 |
| Gross Beta Particle Activity | 6.095 pCi/L No EPA limit set
worst single sample: 6.1 pCi/L | 2/3 | SYR4 | 2014–2017 |
| Simazine | 0.2225 µg/L 5.6% of the EPA limit 4 µg/L
worst single sample: 0.2300 µg/L | 2/13 | SYR4 | 2012–2018 |
| Carbon Tetrachloride | 0.6000 µg/L 12% of the EPA limit 5 µg/L | 1/21 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.9 pCi/L 58% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2014 |
| Monochloroacetic Acid | 7.4 µg/L No EPA limit set | 1/30 | SYR4 | 2013–2019 |
| Selenium | 3.1 µg/L 6.2% of the EPA limit 50 µg/L | 1/9 | SYR4 | 2014–2019 |
78 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, TotalChlorobenzeneCadmiumCarbofuranChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Northwest Harris County Mud 5
Is Northwest Harris County Mud 5 tap water safe to drink?
EPA monitoring detected 31 contaminants in Northwest Harris County Mud 5'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 Northwest Harris County Mud 5's water?
EPA monitoring detected Copper, Nitrate, Bromodichloromethane, Total Haloacetic Acids (HAA5), Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Northwest Harris County Mud 5 serve?
Northwest Harris County Mud 5 reports serving 25,425 people in Texas, per its EPA record.
Has Northwest Harris County Mud 5 had any water quality violations?
The EPA has 26 violations on file for Northwest Harris County Mud 5, of which 0 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.