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.
29
health-based violations
206
violations on file
5
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| TT | Health-based | Resolved | 2024-01-02 |
| TT | Health-based | Resolved | 2024-01-02 |
| TT | Health-based | Resolved | 2024-01-02 |
| TT | Health-based | Resolved | 2024-01-02 |
| MCL | Health-based | Archived | 2001-04-01 → 2001-04-30 |
| MCL | Health-based | Archived | 2001-04-01 → 2001-04-30 |
| MCL | Health-based | Archived | 2001-01-01 → 2001-01-31 |
| MCL | Health-based | Archived | 2001-01-01 → 2001-01-31 |
| MCL | Health-based | Archived | 1998-10-01 → 1998-10-31 |
| MCL | Health-based | Archived | 1998-10-01 → 1998-10-31 |
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 | 1784 µg/L 137% of the EPA limit, at the 95th percentile of samples — 1300 µg/L
worst single sample: 2800 µg/L | 73/103 | SYR4 | 2012–2018 |
| Nitrate | 1310 µg/L 13% of the EPA limit 10000 µg/L
worst single sample: 1560 µg/L | 48/130 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13.19 µg/L No EPA limit set
worst single sample: 14.8 µg/L | 28/28 | SYR4 | 2012–2019 |
| Dibromochloromethane | 7.4755 µg/L No EPA limit set
worst single sample: 8.03 µg/L | 28/28 | SYR4 | 2012–2019 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L | 28/28 | LCR | 2025 |
| TTHM | 54.99 µg/L 69% of the EPA limit 80 µg/L
worst single sample: 70.9 µg/L | 28/28 | SYR4 | 2012–2019 |
| Chloroform | 42.325 µg/L No EPA limit set
worst single sample: 49.9 µg/L | 26/28 | SYR4 | 2012–2019 |
| Barium | 142.75 µg/L 7.1% of the EPA limit 2000 µg/L
worst single sample: 148 µg/L | 22/22 | SYR4 | 2012–2019 |
| Fluoride | 1097 µg/L 27% of the EPA limit 4000 µg/L
worst single sample: 1560 µg/L | 22/22 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 15.1575 µg/L 25% of the EPA limit 60 µg/L
worst single sample: 26.7 µg/L | 20/28 | SYR4 | 2012–2019 |
| Arsenic | 1.4165 µg/L 14% of the EPA limit 10 µg/L
worst single sample: 1.51 µg/L | 18/22 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 8.2935 µg/L No EPA limit set
worst single sample: 15 µg/L | 18/28 | SYR4 | 2012–2019 |
| Bromoform | 2.4444 µg/L No EPA limit set
worst single sample: 2.89 µg/L | 17/28 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 3.718 pCi/L 74% of the EPA limit 5 pCi/L
worst single sample: 3.79 pCi/L | 17/17 | SYR4 | 2012–2018 |
| Trichloroacetic Acid | 8.8345 µg/L No EPA limit set
worst single sample: 9.01 µg/L | 14/28 | SYR4 | 2012–2019 |
| Lithium | 34.8 µg/L No EPA limit set | 14/14 | UCMR-5 | 2023 |
| Dibromoacetic Acid | 2.51 µg/L No EPA limit set
worst single sample: 2.9 µg/L | 13/28 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1129 µg/L 11% of the EPA limit 10000 µg/L
worst single sample: 1140 µg/L | 12/36 | SYR4 | 2012–2016 |
| Monobromoacetic Acid | 2.4075 µg/L No EPA limit set
worst single sample: 2.61 µg/L | 4/28 | SYR4 | 2012–2019 |
| Chromium | 7.1905 µg/L 7.2% of the EPA limit 100 µg/L
worst single sample: 7.2 µg/L | 2/22 | SYR4 | 2012–2019 |
| Lead | 6.23 µg/L 42% of the EPA limit 15 µg/L
worst single sample: 6.38 µg/L | 2/103 | SYR4 | 2012–2018 |
| Nitrite | 39 µg/L 3.9% of the EPA limit 1000 µg/L | 2/66 | SYR4 | 2012–2019 |
| Cyanide | 5 µg/L 2.5% of the EPA limit 200 µg/L | 1/20 | SYR4 | 2012–2018 |
| Gross Beta Particle Activity | 5 pCi/L No EPA limit set | 1/1 | SYR4 | 2014 |
| Selenium | 2.33 µg/L 4.7% of the EPA limit 50 µg/L | 1/22 | 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Crest Hill
Is Crest Hill tap water safe to drink?
EPA monitoring detected 32 contaminants in Crest 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 Crest Hill's water?
EPA monitoring detected Copper, Nitrate, Bromodichloromethane, Dibromochloromethane, Lead, and others. The full list with the level and data source for each is above.
How many people does Crest Hill serve?
Crest Hill reports serving 21,169 people in Illinois, per its EPA record.
Has Crest Hill had any water quality violations?
The EPA has 206 violations on file for Crest Hill, of which 29 are health-based (a contaminant limit or required treatment was breached) and 5 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.