B74/100
TROY — Water Quality Report 2026
Serving 16,962 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1191000
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.69 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 TROY
Is TROY water safe to drink?
TROY water receives a grade of B (74/100), which is considered good. Out of 67 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has TROY detected?
67 contaminants were tested in TROY's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does TROY have any EPA violations?
Yes, TROY has 6 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, MCL, TT. 3 are health-based violations.
How many people does TROY serve?
TROY serves approximately 16,962 people, Illinois. The system provides water to 1 community: Troy.
What type of water does TROY provide?
TROY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1191000.
How does TROY compare to other utilities in Illinois?
TROY scores 74/100 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.