B64/100
ELROY WATERWORKS — Water Quality Report 2026
Serving 1,333 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI7290122
Violations
8
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.39 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 ELROY WATERWORKS
Is ELROY WATERWORKS water safe to drink?
ELROY WATERWORKS water receives a grade of B (64/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ELROY WATERWORKS detected?
2 contaminants were tested in ELROY WATERWORKS's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does ELROY WATERWORKS have any EPA violations?
Yes, ELROY WATERWORKS has 8 EPA violation(s) on record, with the most recent in 2014. Violation types include MCL, Other, MR. 5 are health-based violations.
How many people does ELROY WATERWORKS serve?
ELROY WATERWORKS serves approximately 1,333 people, Wisconsin. The system provides water to 1 community: Elroy.
What type of water does ELROY WATERWORKS provide?
ELROY WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI7290122.
How does ELROY WATERWORKS compare to other utilities in Wisconsin?
ELROY WATERWORKS scores 64/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Wisconsin state page for a full comparison of water systems.