B70/100
PRINCETON — Water Quality Report 2026
Serving 7,832 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0110850
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.044 mg/L | 0.015 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: 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 PRINCETON
Is PRINCETON water safe to drink?
PRINCETON water receives a grade of B (70/100), which is considered good. Out of 31 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has PRINCETON detected?
31 contaminants were tested in PRINCETON's water. Notable contaminants include Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does PRINCETON have any EPA violations?
Yes, PRINCETON has 6 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, TT, MRDL. 4 are health-based violations.
How many people does PRINCETON serve?
PRINCETON serves approximately 7,832 people, Illinois. The system provides water to 1 community: Princeton.
What type of water does PRINCETON provide?
PRINCETON sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0110850.
How does PRINCETON compare to other utilities in Illinois?
PRINCETON scores 70/100 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.