B79/100
BLUE ISLAND — Water Quality Report 2026
Serving 21,494 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0310240
Violations
10
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 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: July 1, 2023 – July 3, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – July 27, 2022Enforcement: 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 BLUE ISLAND
Is BLUE ISLAND water safe to drink?
BLUE ISLAND water receives a grade of B (79/100), 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 BLUE ISLAND detected?
69 contaminants were tested in BLUE ISLAND's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BLUE ISLAND have any EPA violations?
Yes, BLUE ISLAND has 10 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, TT. 2 are health-based violations.
How many people does BLUE ISLAND serve?
BLUE ISLAND serves approximately 21,494 people, Illinois. The system provides water to 1 community: Blue Island.
What type of water does BLUE ISLAND provide?
BLUE ISLAND 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 IL0310240.
How does BLUE ISLAND compare to other utilities in Illinois?
BLUE ISLAND scores 79/100 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.