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.
10
health-based violations
74
violations on file
1
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 1996-06-01 → 1996-06-30 |
| MCL | Health-based | Archived | 1996-06-01 → 1996-06-30 |
| MCL | Health-based | Archived | 1996-06-01 → 1996-06-30 |
| MCL | Health-based | Archived | 1996-06-01 → 1996-06-30 |
| MCL | Health-based | Archived | 1995-06-01 → 1995-06-30 |
| MCL | Health-based | Archived | 1995-06-01 → 1995-06-30 |
| MCL | Health-based | Archived | 1995-06-01 → 1995-06-30 |
| MCL | Health-based | Archived | 1995-06-01 → 1995-06-30 |
| TT | Health-based | Resolved | 1992-12-21 |
| TT | Health-based | Resolved | 1992-12-21 |
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 | 1786 µg/L 137% of the EPA limit, at the 95th percentile of samples — 1300 µg/L
worst single sample: 2800 µg/L | 133/140 | SYR4 | 2012–2019 |
| Lead | 10.2 µg/L 68% of the EPA limit 15 µg/L
worst single sample: 85.4 µg/L | 73/140 | SYR4 | 2012–2019 |
| Lead | 0.0061 mg/L 41% of the EPA limit 0.0150 mg/L | 28/28 | LCR | 2025 |
| Nitrate | 630 µg/L 6.3% of the EPA limit 10000 µg/L | 16/40 | SYR4 | 2012–2019 |
| Barium | 149 µg/L 7.5% of the EPA limit 2000 µg/L
worst single sample: 160 µg/L | 12/12 | SYR4 | 2012–2018 |
| Fluoride | 1065 µg/L 27% of the EPA limit 4000 µg/L
worst single sample: 1070 µg/L | 11/12 | SYR4 | 2012–2018 |
| cis-1,2-Dichloroethylene | 0.9180 µg/L 1.3% of the EPA limit 70 µg/L
worst single sample: 0.9900 µg/L | 9/34 | SYR4 | 2012–2019 |
| Bromodichloromethane | 11.157 µg/L No EPA limit set
worst single sample: 12.2 µg/L | 8/8 | SYR4 | 2013–2019 |
| Chloroform | 20.2975 µg/L No EPA limit set
worst single sample: 24.2 µg/L | 8/8 | SYR4 | 2013–2019 |
| TTHM | 37.085 µg/L 46% of the EPA limit 80 µg/L
worst single sample: 41.6 µg/L | 8/8 | SYR4 | 2013–2019 |
| Dibromochloromethane | 5.3656 µg/L No EPA limit set
worst single sample: 5.44 µg/L | 7/8 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 15.12 µg/L 25% of the EPA limit 60 µg/L
worst single sample: 17.55 µg/L | 6/8 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 1.458 µg/L No EPA limit set
worst single sample: 1.5 µg/L | 5/8 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 6.832 µg/L No EPA limit set
worst single sample: 7.24 µg/L | 5/8 | SYR4 | 2013–2019 |
| Arsenic | 2.44 µg/L 24% of the EPA limit 10 µg/L
worst single sample: 2.5 µg/L | 3/12 | SYR4 | 2012–2018 |
| Bromoform | 2.5208 µg/L No EPA limit set
worst single sample: 2.61 µg/L | 3/8 | SYR4 | 2013–2019 |
| Combined Radium (-226 And -228) | 2.568 pCi/L 51% of the EPA limit 5 pCi/L
worst single sample: 2.7 pCi/L | 3/7 | SYR4 | 2012–2018 |
| Nitrate-Nitrite | 488 µg/L 4.9% of the EPA limit 10000 µg/L
worst single sample: 490 µg/L | 3/3 | SYR4 | 2012–2018 |
| Dichloroacetic Acid | 8.7295 µg/L No EPA limit set
worst single sample: 9.02 µg/L | 2/8 | SYR4 | 2013–2019 |
| Lithium | 10.6 µg/L No EPA limit set | 2/8 | UCMR-5 | 2024 |
| Monobromoacetic Acid | 1.01 µg/L No EPA limit set | 1/8 | SYR4 | 2013–2019 |
86 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Fox Lake
Is Fox Lake tap water safe to drink?
EPA monitoring detected 23 contaminants in Fox Lake'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 Fox Lake's water?
EPA monitoring detected Copper, Lead, Lead, Nitrate, Barium, and others. The full list with the level and data source for each is above.
How many people does Fox Lake serve?
Fox Lake reports serving 11,780 people in Illinois, per its EPA record.
Has Fox Lake had any water quality violations?
The EPA has 74 violations on file for Fox Lake, of which 10 are health-based (a contaminant limit or required treatment was breached) and 1 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.