C42/100
PROSPECT HEIGHTS — Water Quality Report 2026
Serving 2,280 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0312530
Violations
11
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.88 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: 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 PROSPECT HEIGHTS
Is PROSPECT HEIGHTS water safe to drink?
PROSPECT HEIGHTS water receives a grade of C (42/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 11 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PROSPECT HEIGHTS detected?
2 contaminants were tested in PROSPECT HEIGHTS's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does PROSPECT HEIGHTS have any EPA violations?
Yes, PROSPECT HEIGHTS has 11 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL, TT. 9 are health-based violations.
How many people does PROSPECT HEIGHTS serve?
PROSPECT HEIGHTS serves approximately 2,280 people, Illinois. The system provides water to 1 community: Prospect Heights.
What type of water does PROSPECT HEIGHTS provide?
PROSPECT HEIGHTS 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 IL0312530.
How does PROSPECT HEIGHTS compare to other utilities in Illinois?
PROSPECT HEIGHTS scores 42/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Illinois state page for a full comparison of water systems.