Is Round Lake 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
MCL	Health-based	Resolved	1992-03-27 → 1996-03-26
MCL	Health-based	Resolved	1992-03-27 → 1996-03-26
MCL	Health-based	Resolved	1992-03-27 → 1996-03-26
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31
MCL	Health-based	Resolved	1985-09-01 → 1989-08-31

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	9.2575 µg/L No EPA limit set worst single sample: 13 µg/L	66/67	SYR4	2012–2019
Chloroform	15.475 µg/L No EPA limit set worst single sample: 20 µg/L	66/67	SYR4	2012–2019
Dibromochloromethane	6.6425 µg/L No EPA limit set worst single sample: 7.29 µg/L	66/67	SYR4	2012–2019
TTHM	31.2 µg/L 39% of the EPA limit 80 µg/L worst single sample: 41.4 µg/L	66/67	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	9.499 µg/L 16% of the EPA limit 60 µg/L worst single sample: 16.21 µg/L	52/65	SYR4	2012–2019
Bromoform	1.359 µg/L No EPA limit set worst single sample: 1.55 µg/L	43/67	SYR4	2012–2019
Trichloroacetic Acid	3.99 µg/L No EPA limit set worst single sample: 6.26 µg/L	41/65	SYR4	2012–2019
Dichloroacetic Acid	6.686 µg/L No EPA limit set worst single sample: 8.18 µg/L	37/66	SYR4	2012–2019
Dibromoacetic Acid	1.899 µg/L No EPA limit set worst single sample: 2 µg/L	22/65	SYR4	2012–2019
Lead	0.0025 mg/L 17% of the EPA limit 0.0150 mg/L	17/17	LCR	2026
Lead	38.58 µg/L 257% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 68.7 µg/L	13/60	SYR4	2014–2017
Monobromoacetic Acid	2.2 µg/L No EPA limit set worst single sample: 2.4 µg/L	11/65	SYR4	2012–2019
Copper	154.9 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 158 µg/L	3/60	SYR4	2014–2017

31 contaminants tested, none detected

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Utility contact

Contact: SCHROFF, BRANDY
Phone: 847-546-5400
Email: [email protected]

Frequently asked questions about Round Lake

Is Round Lake tap water safe to drink?

EPA monitoring detected 13 contaminants in Round Lake'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 Round Lake's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Round Lake serve?

Round Lake reports serving 18,430 people in Illinois, per its EPA record.

Has Round Lake had any water quality violations?

The EPA has 29 violations on file for Round Lake, of which 16 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.