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.
2
health-based violations
9
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 1992-05-01 → 1992-05-31 |
| MCL | Health-based | Archived | 1991-02-01 → 1991-02-28 |
| MR | Monitoring | Resolved | 2022-10-01 |
| MR | Monitoring | Resolved | 2022-10-01 |
| MR | Monitoring | Resolved | 2022-10-01 |
| MR | Monitoring | Resolved | 2022-10-01 |
| MR | Monitoring | Resolved | 2016-12-30 |
| MR | Monitoring | Resolved | 2016-12-30 |
| Other | Monitoring | Archived | 1992-05-01 → 1992-05-31 |
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 | 9.665 µg/L No EPA limit set
worst single sample: 13.7 µg/L | 127/141 | SYR4 | 2012–2019 |
| Chloroform | 20.9 µg/L No EPA limit set
worst single sample: 27 µg/L | 126/141 | SYR4 | 2012–2019 |
| TTHM | 36.05 µg/L 45% of the EPA limit 80 µg/L
worst single sample: 41 µg/L | 126/128 | SYR4 | 2012–2019 |
| Dibromochloromethane | 5.847 µg/L No EPA limit set
worst single sample: 16.2 µg/L | 124/141 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 19.525 µg/L No EPA limit set
worst single sample: 31.7 µg/L | 124/128 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 28.475 µg/L 47% of the EPA limit 60 µg/L
worst single sample: 39.1 µg/L | 124/128 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 3.655 µg/L No EPA limit set
worst single sample: 5.5 µg/L | 110/128 | SYR4 | 2012–2019 |
| Copper | 303 µg/L 23% of the EPA limit 1300 µg/L
worst single sample: 660 µg/L | 95/95 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 5.825 µg/L No EPA limit set
worst single sample: 8.7 µg/L | 80/128 | SYR4 | 2012–2019 |
| Nitrate | 1241.5 µg/L 12% of the EPA limit 10000 µg/L
worst single sample: 1300 µg/L | 70/78 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 5.2 µg/L No EPA limit set
worst single sample: 6.5 µg/L | 63/128 | SYR4 | 2012–2019 |
| Bromoform | 9.048 µg/L No EPA limit set
worst single sample: 10.8 µg/L | 37/141 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.2 µg/L No EPA limit set
worst single sample: 2.7 µg/L | 21/128 | SYR4 | 2012–2019 |
| Lead | 4.73 µg/L 32% of the EPA limit 15 µg/L
worst single sample: 5.9 µg/L | 14/95 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 1215.5 µg/L 12% of the EPA limit 10000 µg/L
worst single sample: 1300 µg/L | 14/15 | SYR4 | 2012–2019 |
| Lead | 0.00062 mg/L 4.2% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2025 |
| Barium | 78.1 µg/L 3.9% of the EPA limit 2000 µg/L
worst single sample: 79 µg/L | 7/7 | SYR4 | 2015–2019 |
| Fluoride | 733.5 µg/L 18% of the EPA limit 4000 µg/L
worst single sample: 756 µg/L | 7/7 | SYR4 | 2012–2018 |
| Lithium | 76.6 µg/L No EPA limit set | 6/14 | UCMR-5 | 2023 |
| Chromium | 2.56 µg/L 2.6% of the EPA limit 100 µg/L
worst single sample: 2.6 µg/L | 5/7 | SYR4 | 2015–2019 |
| Combined Radium (-226 And -228) | 2.589 pCi/L 52% of the EPA limit 5 pCi/L
worst single sample: 2.7 pCi/L | 4/4 | SYR4 | 2012–2017 |
| Cyanide | 48.14 µg/L 24% of the EPA limit 200 µg/L
worst single sample: 49.1 µg/L | 3/6 | SYR4 | 2014–2017 |
| Di(2-ethylhexyl) Phthalate | 0.9000 µg/L 15% of the EPA limit 6 µg/L | 2/16 | SYR4 | 2012–2019 |
| Selenium | 1.095 µg/L 2.2% of the EPA limit 50 µg/L
worst single sample: 1.1 µg/L | 2/7 | SYR4 | 2015–2019 |
| Arsenic | 0.8400 µg/L 8.4% of the EPA limit 10 µg/L | 1/7 | SYR4 | 2015–2019 |
| Gross Alpha, Excl. Radon And U | 3.3 pCi/L 22% of the EPA limit 15 pCi/L | 1/4 | SYR4 | 2015–2018 |
| Simazine | 0.1000 µg/L 2.5% of the EPA limit 4 µg/L | 1/16 | SYR4 | 2012–2019 |
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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about City of the Colony
Is City of the Colony tap water safe to drink?
EPA monitoring detected 31 contaminants in City of the Colony'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 the Colony's water?
EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Dibromochloromethane, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.
How many people does City of the Colony serve?
City of the Colony reports serving 45,367 people in Texas, per its EPA record.
Has City of the Colony had any water quality violations?
The EPA has 9 violations on file for City of the Colony, of which 2 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.