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.
112
health-based violations
250
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-10-01 → 2005-12-31 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-09-30 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-09-30 |
| MCL | Health-based | Resolved | 2005-07-01 → 2005-09-30 |
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 | 311.15 µg/L 24% of the EPA limit 1300 µg/L
worst single sample: 898 µg/L | 92/261 | SYR4 | 2012–2018 |
| Nitrate | 853.05 µg/L 8.5% of the EPA limit 10000 µg/L
worst single sample: 1060 µg/L | 64/112 | SYR4 | 2012–2019 |
| Lead | 24.21 µg/L 161% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 116 µg/L | 47/261 | SYR4 | 2012–2018 |
| Bromodichloromethane | 9.315 µg/L No EPA limit set
worst single sample: 11.6 µg/L | 31/31 | SYR4 | 2012–2019 |
| Bromoform | 7.185 µg/L No EPA limit set
worst single sample: 8.09 µg/L | 31/31 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 4.05 pCi/L 81% of the EPA limit 5 pCi/L
worst single sample: 5.5 pCi/L | 31/36 | SYR4 | 2013–2019 |
| Dibromochloromethane | 13.3 µg/L No EPA limit set
worst single sample: 15.8 µg/L | 31/31 | SYR4 | 2012–2019 |
| TTHM | 34 µg/L 43% of the EPA limit 80 µg/L
worst single sample: 41.2 µg/L | 31/31 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 8.185 µg/L 14% of the EPA limit 60 µg/L
worst single sample: 10.8 µg/L | 31/31 | SYR4 | 2012–2019 |
| Chloroform | 4.2015 µg/L No EPA limit set
worst single sample: 5.69 µg/L | 30/31 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 3.393 µg/L No EPA limit set
worst single sample: 5.08 µg/L | 27/31 | SYR4 | 2012–2019 |
| Lead | 0.0082 mg/L 55% of the EPA limit 0.0150 mg/L | 20/20 | LCR | 2025 |
| Barium | 132.4 µg/L 6.6% of the EPA limit 2000 µg/L
worst single sample: 145 µg/L | 15/15 | SYR4 | 2012–2017 |
| Dichloroacetic Acid | 2.971 µg/L No EPA limit set
worst single sample: 3.16 µg/L | 15/31 | SYR4 | 2012–2019 |
| Fluoride | 1232 µg/L 31% of the EPA limit 4000 µg/L
worst single sample: 1260 µg/L | 15/15 | SYR4 | 2012–2017 |
| Lithium | 54.6 µg/L No EPA limit set | 15/15 | UCMR-5 | 2025 |
| Nitrate-Nitrite | 774.2 µg/L 7.7% of the EPA limit 10000 µg/L
worst single sample: 808 µg/L | 14/26 | SYR4 | 2012–2016 |
| Dibromoacetic Acid | 4.2165 µg/L No EPA limit set
worst single sample: 4.41 µg/L | 10/31 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 1.658 µg/L No EPA limit set
worst single sample: 1.81 µg/L | 5/31 | SYR4 | 2012–2019 |
| Arsenic | 1.1842 µg/L 12% of the EPA limit 10 µg/L
worst single sample: 1.24 µg/L | 4/15 | SYR4 | 2012–2017 |
| Xylenes, Total | 3.401 µg/L 0% of the EPA limit 10000 µg/L
worst single sample: 3.56 µg/L | 4/32 | SYR4 | 2012–2019 |
| Ethylbenzene | 0.5600 µg/L 0.1% of the EPA limit 700 µg/L | 1/32 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2.68 µg/L No EPA limit set | 1/31 | SYR4 | 2012–2019 |
82 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 DibromideEndothallEndrinHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Romeoville
Is Romeoville tap water safe to drink?
EPA monitoring detected 26 contaminants in Romeoville'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 Romeoville's water?
EPA monitoring detected Copper, Nitrate, Lead, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.
How many people does Romeoville serve?
Romeoville reports serving 50,458 people in Illinois, per its EPA record.
Has Romeoville had any water quality violations?
The EPA has 250 violations on file for Romeoville, of which 112 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.