Is Riverwoods Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Lake

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
TT	Health-based	Resolved	2005-04-01 → 2005-04-30
TT	Health-based	Resolved	2005-04-01 → 2005-04-30
TT	Health-based	Resolved	2005-04-01 → 2005-04-30
TT	Health-based	Resolved	2005-04-01 → 2005-04-30
MR	Monitoring	Archived	2026-01-01 → 2026-03-31
MR	Monitoring	Resolved	2024-07-01 → 2024-09-30
MR	Monitoring	Resolved	2024-07-01 → 2024-09-30
MR	Monitoring	Resolved	2024-07-01 → 2024-09-30
MR	Monitoring	Resolved	2024-07-01 → 2024-09-30
MON	Monitoring	Resolved	2019-11-01 → 2019-11-30

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	11.7 µg/L No EPA limit set worst single sample: 13.6 µg/L	25/25	SYR4	2012–2019
Chloroform	26.06 µg/L No EPA limit set worst single sample: 37.6 µg/L	25/25	SYR4	2012–2019
Dibromochloromethane	6.306 µg/L No EPA limit set worst single sample: 6.52 µg/L	25/25	SYR4	2012–2019
Dichloroacetic Acid	16.44 µg/L No EPA limit set worst single sample: 19.1 µg/L	25/25	SYR4	2012–2019
TTHM	43.9 µg/L 55% of the EPA limit 80 µg/L worst single sample: 57.5 µg/L	25/25	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	30.26 µg/L 50% of the EPA limit 60 µg/L worst single sample: 35.8 µg/L	25/25	SYR4	2012–2019
Trichloroacetic Acid	9.852 µg/L No EPA limit set worst single sample: 9.93 µg/L	25/25	SYR4	2012–2019
Monobromoacetic Acid	2.69 µg/L No EPA limit set worst single sample: 3.09 µg/L	21/25	SYR4	2012–2019
Copper	361.5 µg/L 28% of the EPA limit 1300 µg/L worst single sample: 372 µg/L	15/60	SYR4	2012–2018
Lead	0.0025 mg/L 17% of the EPA limit 0.0150 mg/L	14/14	LCR	2024
Lead	11.38 µg/L 76% of the EPA limit 15 µg/L worst single sample: 11.8 µg/L	7/60	SYR4	2012–2018
Dibromoacetic Acid	3.036 µg/L No EPA limit set worst single sample: 3.3 µg/L	4/25	SYR4	2012–2019
Monochloroacetic Acid	5.09 µg/L No EPA limit set worst single sample: 5.31 µg/L	3/25	SYR4	2012–2019
Bromoform	0.5000 µg/L No EPA limit set	2/25	SYR4	2012–2019

30 contaminants tested, none detected

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Utility contact

Contact: SMITH, CARISSA
Phone: 847-821-6259
Email: [email protected]

Frequently asked questions about Riverwoods

Is Riverwoods tap water safe to drink?

EPA monitoring detected 14 contaminants in Riverwoods'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 Riverwoods's water?

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

How many people does Riverwoods serve?

Riverwoods reports serving 3,618 people in Illinois, per its EPA record.

Has Riverwoods had any water quality violations?

The EPA has 28 violations on file for Riverwoods, of which 4 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.