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.
33
health-based violations
253
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2016-06-01 → 2016-06-30 |
| MCL | Health-based | Resolved | 2016-06-01 → 2016-06-30 |
| MCL | Health-based | Resolved | 2016-06-01 → 2016-06-30 |
| MCL | Health-based | Resolved | 2016-06-01 → 2016-06-30 |
| MCL | Health-based | Archived | 2001-02-01 → 2001-02-28 |
| MCL | Health-based | Archived | 2001-02-01 → 2001-02-28 |
| TT | Health-based | Resolved | 1995-06-01 |
| TT | Health-based | Resolved | 1994-11-21 |
| MCL | Health-based | Resolved | 1988-09-01 → 1992-08-31 |
| MCL | Health-based | Resolved | 1988-09-01 → 1992-08-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFBS | 0.0040 µg/L | 2/6 | 2024 |
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 | 887 µg/L 68% of the EPA limit 1300 µg/L
worst single sample: 1340 µg/L | 76/91 | SYR4 | 2012–2018 |
| Combined Radium (-226 And -228) | 4.736 pCi/L 95% of the EPA limit 5 pCi/L
worst single sample: 7.39 pCi/L | 33/33 | SYR4 | 2012–2019 |
| TTHM | 16.88 µg/L 21% of the EPA limit 80 µg/L
worst single sample: 30.7 µg/L | 31/45 | SYR4 | 2012–2019 |
| Bromoform | 7.3785 µg/L No EPA limit set
worst single sample: 11.6 µg/L | 30/45 | SYR4 | 2012–2019 |
| Dibromochloromethane | 5.846 µg/L No EPA limit set
worst single sample: 9.99 µg/L | 30/45 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 4.553 µg/L 7.6% of the EPA limit 60 µg/L
worst single sample: 6.79 µg/L | 24/45 | SYR4 | 2012–2019 |
| Bromodichloromethane | 4.816 µg/L No EPA limit set
worst single sample: 6.25 µg/L | 23/45 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.649 µg/L No EPA limit set
worst single sample: 3.72 µg/L | 18/45 | SYR4 | 2012–2019 |
| Nitrate | 1880 µg/L 19% of the EPA limit 10000 µg/L | 16/48 | SYR4 | 2012–2019 |
| Lead | 0.0011 mg/L 7.1% of the EPA limit 0.0150 mg/L | 14/14 | LCR | 2025 |
| Barium | 47.36 µg/L 2.4% of the EPA limit 2000 µg/L
worst single sample: 50.6 µg/L | 13/14 | SYR4 | 2012–2019 |
| Fluoride | 1160 µg/L 29% of the EPA limit 4000 µg/L | 13/13 | SYR4 | 2012–2019 |
| Chloroform | 2.95 µg/L No EPA limit set
worst single sample: 3.08 µg/L | 11/45 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.51 µg/L No EPA limit set
worst single sample: 1.53 µg/L | 11/45 | SYR4 | 2012–2019 |
| Lithium | 47.9 µg/L No EPA limit set | 6/6 | UCMR-5 | 2024 |
| Gross Alpha, Excl. Radon And U | 17.328 pCi/L 116% of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 20.3 pCi/L | 5/5 | SYR4 | 2018–2019 |
| Nitrate-Nitrite | 1880 µg/L 19% of the EPA limit 10000 µg/L | 5/15 | SYR4 | 2012–2016 |
| Dibromoacetic Acid | 0.9278 µg/L No EPA limit set
worst single sample: 0.9500 µg/L | 4/45 | SYR4 | 2012–2019 |
| Arsenic | 1.1595 µg/L 12% of the EPA limit 10 µg/L
worst single sample: 1.19 µg/L | 3/13 | SYR4 | 2012–2019 |
| Combined Uranium | 1.1996 µg/L 4% of the EPA limit 30 µg/L
worst single sample: 1.26352 µg/L | 3/5 | SYR4 | 2018–2019 |
| Chromium | 5.4175 µg/L 5.4% of the EPA limit 100 µg/L
worst single sample: 5.43 µg/L | 2/13 | SYR4 | 2012–2019 |
| Selenium | 4.5535 µg/L 9.1% of the EPA limit 50 µg/L
worst single sample: 4.61 µg/L | 2/13 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 1.09855 µg/L No EPA limit set
worst single sample: 1.13 µg/L | 2/45 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 2.97 µg/L 50% of the EPA limit 6 µg/L | 1/18 | SYR4 | 2014–2019 |
| Lead | 27.5 µg/L 183% of the EPA limit, at the 95th percentile of samples — 15 µg/L | 1/91 | SYR4 | 2012–2018 |
| Monochloroacetic Acid | 5.51 µg/L No EPA limit set | 1/45 | SYR4 | 2012–2019 |
| Nitrite | 17 µg/L 1.7% of the EPA limit 1000 µg/L | 1/24 | SYR4 | 2012–2018 |
83 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Minooka
Is Minooka tap water safe to drink?
EPA monitoring detected 28 contaminants in Minooka'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 Minooka's water?
EPA monitoring detected Copper, Combined Radium (-226 And -228), TTHM, Bromoform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Minooka serve?
Minooka reports serving 12,800 people in Illinois, per its EPA record.
Has Minooka had any water quality violations?
The EPA has 253 violations on file for Minooka, of which 33 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.