C50/100
FOX LAKE — Water Quality Report 2026
Serving 11,780 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0970200
Violations
15
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
PFOS | 0.005 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
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 FOX LAKE
Is FOX LAKE water safe to drink?
FOX LAKE water receives a grade of C (50/100), which is considered fair. 2 contaminant(s) exceed EPA legal limits and 15 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has FOX LAKE detected?
32 contaminants were tested in FOX LAKE's water. Notable contaminants include PFOS, Copper (90th percentile), Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does FOX LAKE have any EPA violations?
Yes, FOX LAKE has 15 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 4 are health-based violations.
How many people does FOX LAKE serve?
FOX LAKE serves approximately 11,780 people, Illinois. The system provides water to 1 community: Fox Lake.
What type of water does FOX LAKE provide?
FOX LAKE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0970200.
How does FOX LAKE compare to other utilities in Illinois?
FOX LAKE scores 50/100 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.