Is Rosemont Tap Water Safe? Quality Report

Water source: SWP
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
RPT	Monitoring	Unaddressed	2025-07-02
RPT	Monitoring	Unaddressed	2025-07-02
MR	Monitoring	Resolved	2020-12-30
MR	Monitoring	Resolved	2020-12-30
MR	Monitoring	Archived	2001-05-01 → 2001-05-31

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
Copper	91.2 µg/L 7% of the EPA limit 1300 µg/L worst single sample: 100 µg/L	35/40	SYR4	2014–2017
Bromodichloromethane	13.18 µg/L No EPA limit set worst single sample: 14.7 µg/L	22/22	SYR4	2012–2019
Chloroform	28.66 µg/L No EPA limit set worst single sample: 35.2 µg/L	22/22	SYR4	2012–2019
Dibromochloromethane	6.702 µg/L No EPA limit set worst single sample: 6.74 µg/L	22/22	SYR4	2012–2019
TTHM	47.325 µg/L 59% of the EPA limit 80 µg/L worst single sample: 56.6 µg/L	22/22	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	23.085 µg/L 38% of the EPA limit 60 µg/L worst single sample: 27.8 µg/L	22/22	SYR4	2012–2019
Trichloroacetic Acid	9.8985 µg/L No EPA limit set worst single sample: 10.2 µg/L	22/22	SYR4	2012–2019
Lead	0.0015 mg/L 10% of the EPA limit 0.0150 mg/L	19/19	LCR	2025
Dichloroacetic Acid	14.17 µg/L No EPA limit set worst single sample: 15.7 µg/L	18/22	SYR4	2012–2019
Dibromoacetic Acid	1.916 µg/L No EPA limit set worst single sample: 1.94 µg/L	13/22	SYR4	2012–2019
Lead	8.77 µg/L 58% of the EPA limit 15 µg/L worst single sample: 9.5 µg/L	3/40	SYR4	2014–2017
Monobromoacetic Acid	1.24 µg/L No EPA limit set	1/22	SYR4	2012–2019

32 contaminants tested, none detected

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Utility contact

Contact: DIMATTEO, FRANK
Phone: 847-698-3744
Email: [email protected]

Frequently asked questions about Rosemont

Is Rosemont tap water safe to drink?

EPA monitoring detected 12 contaminants in Rosemont'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 Rosemont's water?

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

How many people does Rosemont serve?

Rosemont reports serving 3,952 people in Illinois, per its EPA record.

Has Rosemont had any water quality violations?

The EPA has 5 violations on file for Rosemont, of which 0 are health-based (a contaminant limit or required treatment was breached) and 2 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.