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.
130
health-based violations
276
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| MCL | Health-based | Resolved | 2013-07-01 → 2013-09-30 |
| 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 |
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 |
|---|---|---|---|---|
| TTHM | 133.2 µg/L 166% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 157 µg/L | 135/135 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 35.21 µg/L 59% of the EPA limit 60 µg/L
worst single sample: 39.1 µg/L | 127/127 | SYR4 | 2012–2019 |
| Bromoform | 18.28 µg/L No EPA limit set
worst single sample: 22.1 µg/L | 63/63 | SYR4 | 2015–2019 |
| Dibromochloromethane | 21.08 µg/L No EPA limit set
worst single sample: 22.9 µg/L | 63/63 | SYR4 | 2015–2019 |
| Dibromoacetic Acid | 7.825 µg/L No EPA limit set
worst single sample: 9.3 µg/L | 56/56 | SYR4 | 2015–2019 |
| Bromodichloromethane | 8.96 µg/L No EPA limit set
worst single sample: 10.6 µg/L | 55/63 | SYR4 | 2015–2019 |
| Chloroform | 2.185 µg/L No EPA limit set
worst single sample: 5.2 µg/L | 44/63 | SYR4 | 2015–2019 |
| Nitrate | 3415 µg/L 34% of the EPA limit 10000 µg/L
worst single sample: 5200 µg/L | 38/38 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 34/34 | LCR | 2025 |
| Dichloroacetic Acid | 1.985 µg/L No EPA limit set
worst single sample: 2.1 µg/L | 22/56 | SYR4 | 2015–2019 |
| Combined Uranium | 10.195 µg/L 34% of the EPA limit 30 µg/L
worst single sample: 31 µg/L | 20/20 | SYR4 | 2012–2018 |
| Barium | 63 µg/L 3.2% of the EPA limit 2000 µg/L
worst single sample: 250 µg/L | 18/18 | SYR4 | 2013–2019 |
| Fluoride | 190 µg/L 4.8% of the EPA limit 4000 µg/L | 18/18 | SYR4 | 2013–2019 |
| Gross Alpha, Excl. Radon And U | 5.32 pCi/L 35% of the EPA limit 15 pCi/L
worst single sample: 8.2 pCi/L | 17/22 | SYR4 | 2012–2018 |
| Nitrate-Nitrite | 3025 µg/L 30% of the EPA limit 10000 µg/L
worst single sample: 3100 µg/L | 16/16 | SYR4 | 2014–2018 |
| Selenium | 1.715 µg/L 3.4% of the EPA limit 50 µg/L
worst single sample: 2.1 µg/L | 12/18 | SYR4 | 2013–2019 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L
worst single sample: 1.9 pCi/L | 11/17 | SYR4 | 2014–2018 |
| Monochloroacetic Acid | 6.97 µg/L No EPA limit set
worst single sample: 8.3 µg/L | 8/56 | SYR4 | 2015–2019 |
| Arsenic | 2.71 µg/L 27% of the EPA limit 10 µg/L
worst single sample: 3.4 µg/L | 7/17 | SYR4 | 2013–2019 |
| Lithium | 12.5 µg/L No EPA limit set | 4/4 | UCMR-5 | 2025 |
| Trichloroacetic Acid | 2.96 µg/L No EPA limit set
worst single sample: 3 µg/L | 3/56 | SYR4 | 2015–2019 |
| Antimony, Total | 0.8800 µg/L 15% of the EPA limit 6 µg/L | 1/17 | SYR4 | 2013–2019 |
| Gross Beta Particle Activity | 3.9 pCi/L No EPA limit set | 1/1 | SYR4 | 2015 |
| Hexachlorobenzene | 0.0490 µg/L 4.9% of the EPA limit 1 µg/L | 1/20 | SYR4 | 2013–2018 |
| Nitrite | 80 µg/L 8% of the EPA limit 1000 µg/L | 1/16 | SYR4 | 2014–2018 |
| Xylenes, Total | 5.6 µg/L 0.1% of the EPA limit 10000 µg/L | 1/18 | SYR4 | 2012–2019 |
84 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-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Sterling City of
Is Sterling City of tap water safe to drink?
EPA monitoring detected 26 contaminants in Sterling City of'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 Sterling City of's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromoform, Dibromochloromethane, Dibromoacetic Acid, and others. The full list with the level and data source for each is above.
How many people does Sterling City of serve?
Sterling City of reports serving 15,100 people in Colorado, per its EPA record.
Has Sterling City of had any water quality violations?
The EPA has 276 violations on file for Sterling City of, of which 130 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.