B71/100
ROUND LAKE BEACH — Water Quality Report 2026
Serving 27,200 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0971550
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.39 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 10, 2023 – May 6, 2024Enforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About ROUND LAKE BEACH
Is ROUND LAKE BEACH water safe to drink?
ROUND LAKE BEACH water receives a grade of B (71/100), which is considered good. Out of 70 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ROUND LAKE BEACH detected?
70 contaminants were tested in ROUND LAKE BEACH's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does ROUND LAKE BEACH have any EPA violations?
Yes, ROUND LAKE BEACH has 9 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, MCL. 3 are health-based violations.
How many people does ROUND LAKE BEACH serve?
ROUND LAKE BEACH serves approximately 27,200 people, Illinois. The system provides water to 1 community: Round Lake Beach.
What type of water does ROUND LAKE BEACH provide?
ROUND LAKE BEACH sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0971550.
How does ROUND LAKE BEACH compare to other utilities in Illinois?
ROUND LAKE BEACH scores 71/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.