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
36
violations on file
2
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2008-08-01 → 2008-08-31 |
| MCL | Health-based | Resolved | 2008-08-01 → 2008-08-31 |
| MCL | Health-based | Resolved | 2008-08-01 → 2008-08-31 |
| MCL | Health-based | Resolved | 2007-10-01 → 2007-10-31 |
| MCL | Health-based | Resolved | 2007-10-01 → 2007-10-31 |
| MCL | Health-based | Resolved | 2007-10-01 → 2007-10-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-07-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-07-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-07-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-07-31 |
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 |
|---|---|---|---|---|
| Bromodichloromethane | 11.69 µg/L No EPA limit set
worst single sample: 13.2 µg/L | 128/131 | SYR4 | 2012–2019 |
| Chloroform | 15.395 µg/L No EPA limit set
worst single sample: 17.8 µg/L | 128/131 | SYR4 | 2012–2019 |
| Dibromochloromethane | 6.67 µg/L No EPA limit set
worst single sample: 8.7 µg/L | 127/131 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 16.85 µg/L No EPA limit set
worst single sample: 24.5 µg/L | 124/126 | SYR4 | 2012–2019 |
| TTHM | 28.07 µg/L 35% of the EPA limit 80 µg/L
worst single sample: 35.8 µg/L | 124/126 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 24 µg/L 40% of the EPA limit 60 µg/L
worst single sample: 34.2 µg/L | 124/126 | SYR4 | 2012–2019 |
| Copper | 472.7 µg/L 36% of the EPA limit 1300 µg/L
worst single sample: 2066 µg/L | 90/91 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 3.06 µg/L No EPA limit set
worst single sample: 6.4 µg/L | 85/126 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4.485 µg/L No EPA limit set
worst single sample: 12.2 µg/L | 84/126 | SYR4 | 2012–2019 |
| Bromoform | 3.237 µg/L No EPA limit set
worst single sample: 3.4 µg/L | 75/131 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 6.565 µg/L No EPA limit set
worst single sample: 8.7 µg/L | 64/126 | SYR4 | 2012–2019 |
| Nitrate | 745 µg/L 7.5% of the EPA limit 10000 µg/L
worst single sample: 842 µg/L | 48/48 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.685 µg/L No EPA limit set
worst single sample: 2.6 µg/L | 44/126 | SYR4 | 2012–2019 |
| Lead | 9.808 µg/L 65% of the EPA limit 15 µg/L
worst single sample: 16 µg/L | 25/91 | SYR4 | 2013–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 15/15 | LCR | 2025 |
| Nitrate-Nitrite | 723.8 µg/L 7.2% of the EPA limit 10000 µg/L
worst single sample: 729 µg/L | 9/9 | SYR4 | 2012–2015 |
| Atrazine | 0.1000 µg/L 3.3% of the EPA limit 3 µg/L | 3/9 | SYR4 | 2012–2019 |
| Barium | 36.8 µg/L 1.8% of the EPA limit 2000 µg/L
worst single sample: 37 µg/L | 2/2 | SYR4 | 2016–2019 |
| Fluoride | 1402.55 µg/L 35% of the EPA limit 4000 µg/L
worst single sample: 1460 µg/L | 2/2 | SYR4 | 2014–2017 |
| Nitrite | 11.45 µg/L 1.1% of the EPA limit 1000 µg/L
worst single sample: 11.5 µg/L | 2/9 | SYR4 | 2012–2015 |
| Simazine | 0.1270 µg/L 3.2% of the EPA limit 4 µg/L
worst single sample: 0.1300 µg/L | 2/9 | SYR4 | 2012–2019 |
| Arsenic | 0.8100 µg/L 8.1% of the EPA limit 10 µg/L | 1/2 | SYR4 | 2016–2019 |
| Cyanide | 7.28 µg/L 3.6% of the EPA limit 200 µg/L | 1/2 | SYR4 | 2014–2017 |
| Ethylbenzene | 1.34 µg/L 0.2% of the EPA limit 700 µg/L | 1/5 | SYR4 | 2015–2019 |
| Selenium | 1.1 µg/L 2.2% of the EPA limit 50 µg/L | 1/2 | SYR4 | 2016–2019 |
| Xylenes, Total | 8.44 µg/L 0.1% of the EPA limit 10000 µg/L | 1/5 | SYR4 | 2015–2019 |
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, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about City of Cedar Hill
Is City of Cedar Hill tap water safe to drink?
EPA monitoring detected 30 contaminants in City of Cedar Hill'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 City of Cedar Hill's water?
EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.
How many people does City of Cedar Hill serve?
City of Cedar Hill reports serving 50,904 people in Texas, per its EPA record.
Has City of Cedar Hill had any water quality violations?
The EPA has 36 violations on file for City of Cedar Hill, of which 11 are health-based (a contaminant limit or required treatment was breached) and 2 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.