B77/100
ROUND LAKE — Water Quality Report 2026
Serving 18,430 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0971500
Violations
8
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: December 3, 2023 – December 14, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – February 28, 2024Rule: Ground Water RuleEnforcement: 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
Is ROUND LAKE water safe to drink?
ROUND LAKE water receives a grade of B (77/100), which is considered good. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ROUND LAKE detected?
69 contaminants were tested in ROUND LAKE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ROUND LAKE have any EPA violations?
Yes, ROUND LAKE has 8 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 serve?
ROUND LAKE serves approximately 18,430 people, Illinois. The system provides water to 1 community: Round Lake.
What type of water does ROUND LAKE provide?
ROUND LAKE 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 IL0971500.
How does ROUND LAKE compare to other utilities in Illinois?
ROUND LAKE scores 77/100 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.