Is Western Springs Tap Water Safe? Quality Report

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

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2025-10-01 → 2025-12-31
MCL	Health-based	Resolved	2025-10-01 → 2025-12-31
MCL	Health-based	Resolved	2025-10-01 → 2025-12-31
MCL	Health-based	Resolved	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	1991-05-01 → 1991-05-31
MCL	Health-based	Archived	1991-05-01 → 1991-05-31
MCL	Health-based	Archived	1991-05-01 → 1991-05-31
MR	Monitoring	Unaddressed	2026-01-01
MR	Monitoring	Unaddressed	2026-01-01
Other	Monitoring	Unaddressed	2025-07-01

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	926.65 µg/L 71% of the EPA limit 1300 µg/L worst single sample: 1130 µg/L	24/63	SYR4	2014–2017
Lead	0.0020 mg/L 14% of the EPA limit 0.0150 mg/L	21/21	LCR	2026
Bromoform	6.125 µg/L No EPA limit set worst single sample: 6.72 µg/L	15/34	SYR4	2012–2019
TTHM	12.76 µg/L 16% of the EPA limit 80 µg/L worst single sample: 14.44 µg/L	15/34	SYR4	2012–2019
Lead	58.2 µg/L 388% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 91.8 µg/L	13/62	SYR4	2014–2017
Dibromochloromethane	5.169 µg/L No EPA limit set worst single sample: 5.52 µg/L	10/34	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	4.5865 µg/L 7.6% of the EPA limit 60 µg/L worst single sample: 6.31 µg/L	10/34	SYR4	2012–2019
Combined Radium (-226 And -228)	4.578 pCi/L 92% of the EPA limit 5 pCi/L worst single sample: 4.62 pCi/L	8/8	SYR4	2013–2019
Bromodichloromethane	2.298 µg/L No EPA limit set worst single sample: 2.34 µg/L	7/34	SYR4	2012–2019
Barium	262.275 µg/L 13% of the EPA limit 2000 µg/L worst single sample: 341 µg/L	6/6	SYR4	2012–2018
Fluoride	1443.25 µg/L 36% of the EPA limit 4000 µg/L worst single sample: 1700 µg/L	6/6	SYR4	2012–2018
Monobromoacetic Acid	1.7125 µg/L No EPA limit set worst single sample: 1.74 µg/L	6/34	SYR4	2012–2019
Dibromoacetic Acid	1.684 µg/L No EPA limit set worst single sample: 1.79 µg/L	5/34	SYR4	2012–2019
Arsenic	6.405 µg/L 64% of the EPA limit 10 µg/L worst single sample: 6.73 µg/L	3/6	SYR4	2012–2018
Dichloroacetic Acid	0.4620 µg/L No EPA limit set worst single sample: 0.4710 µg/L	2/34	SYR4	2012–2019
Trichloroacetic Acid	1.507 µg/L No EPA limit set worst single sample: 1.53 µg/L	2/34	SYR4	2012–2019
Lithium	66.7 µg/L No EPA limit set	2/2	UCMR-5	2024
Gross Alpha, Excl. Radon And U	7.8 pCi/L 52% of the EPA limit 15 pCi/L	1/1	SYR4	2015
Monochloroacetic Acid	3.26 µg/L No EPA limit set	1/34	SYR4	2012–2019
Nitrate-Nitrite	25 µg/L 0.3% of the EPA limit 10000 µg/L	1/6	SYR4	2012–2018
Nitrite	25 µg/L 2.5% of the EPA limit 1000 µg/L	1/12	SYR4	2012–2019

90 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 TetrachlorideChlordaneChloroformChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrateOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: DERENGOWSKI, RON
Phone: 708-246-1800
Email: [email protected]

Frequently asked questions about Western Springs

Is Western Springs tap water safe to drink?

EPA monitoring detected 21 contaminants in Western Springs'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 Western Springs's water?

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

How many people does Western Springs serve?

Western Springs reports serving 13,274 people in Illinois, per its EPA record.

Has Western Springs had any water quality violations?

The EPA has 34 violations on file for Western Springs, of which 7 are health-based (a contaminant limit or required treatment was breached) and 3 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.