D37/100
WATSEKA — Water Quality Report 2026
Serving 5,500 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0750900
Violations
24
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: December 1, 2023 – July 5, 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 WATSEKA
Is WATSEKA water safe to drink?
WATSEKA water receives a grade of D (37/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 24 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WATSEKA detected?
31 contaminants were tested in WATSEKA's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WATSEKA have any EPA violations?
Yes, WATSEKA has 24 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 9 are health-based violations.
How many people does WATSEKA serve?
WATSEKA serves approximately 5,500 people, Illinois. The system provides water to 1 community: Watseka.
What type of water does WATSEKA provide?
WATSEKA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0750900.
How does WATSEKA compare to other utilities in Illinois?
WATSEKA scores 37/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.