Is West Chicago Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: DuPage

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.

131

health-based violations

138

violations on file

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	2005-10-01 → 2005-12-31
MCL	Health-based	Resolved	2005-10-01 → 2005-12-31
MCL	Health-based	Resolved	2005-10-01 → 2005-12-31

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
Bromodichloromethane	9.249 µg/L No EPA limit set worst single sample: 12.3 µg/L	28/28	SYR4	2012–2019
Bromoform	3.8085 µg/L No EPA limit set worst single sample: 4.62 µg/L	28/28	SYR4	2012–2019
Chloroform	9.5725 µg/L No EPA limit set worst single sample: 9.99 µg/L	28/28	SYR4	2012–2019
Dibromochloromethane	9.3 µg/L No EPA limit set worst single sample: 11.9 µg/L	28/28	SYR4	2012–2019
TTHM	30.188 µg/L 38% of the EPA limit 80 µg/L worst single sample: 38.8 µg/L	28/28	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	7.384 µg/L 12% of the EPA limit 60 µg/L worst single sample: 11.11 µg/L	28/28	SYR4	2012–2019
Dichloroacetic Acid	5.212 µg/L No EPA limit set worst single sample: 6.01 µg/L	27/28	SYR4	2012–2019
Monobromoacetic Acid	2.69 µg/L No EPA limit set worst single sample: 3.14 µg/L	25/28	SYR4	2012–2019
Lead	0.00093 mg/L 6.2% of the EPA limit 0.0150 mg/L	21/21	LCR	2025
Lead	18.175 µg/L 121% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 19.8 µg/L	14/94	SYR4	2012–2018
Trichloroacetic Acid	1.701 µg/L No EPA limit set worst single sample: 1.71 µg/L	10/28	SYR4	2012–2019
Nitrate	129 µg/L 1.3% of the EPA limit 10000 µg/L	8/16	SYR4	2012–2019
Dibromoacetic Acid	2.806 µg/L No EPA limit set worst single sample: 3.13 µg/L	7/28	SYR4	2012–2019
Copper	260.6 µg/L 20% of the EPA limit 1300 µg/L worst single sample: 261 µg/L	5/94	SYR4	2012–2018
Nitrate-Nitrite	124.65 µg/L 1.2% of the EPA limit 10000 µg/L worst single sample: 129 µg/L	4/4	SYR4	2013–2016
Barium	78.77 µg/L 3.9% of the EPA limit 2000 µg/L worst single sample: 84 µg/L	3/3	SYR4	2012–2018
Fluoride	1085.9 µg/L 27% of the EPA limit 4000 µg/L worst single sample: 1110 µg/L	3/3	SYR4	2012–2018
Lithium	36.8 µg/L No EPA limit set	2/2	UCMR-5	2024
Combined Radium (-226 And -228)	2.57 pCi/L 51% of the EPA limit 5 pCi/L	1/2	SYR4	2012–2018

89 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: PATEL, MEHUL
Phone: 630-293-2255
Email: [email protected]

Frequently asked questions about West Chicago

Is West Chicago tap water safe to drink?

EPA monitoring detected 19 contaminants in West Chicago'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 West Chicago's water?

EPA monitoring detected Bromodichloromethane, Bromoform, Chloroform, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does West Chicago serve?

West Chicago reports serving 25,166 people in Illinois, per its EPA record.

Has West Chicago had any water quality violations?

The EPA has 138 violations on file for West Chicago, of which 131 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.