A91/100
JANESVILLE WATER UTILITY — Water Quality Report 2026
Serving 64,415 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1540127
Violations
2
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.010 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 JANESVILLE WATER UTILITY
Is JANESVILLE WATER UTILITY water safe to drink?
JANESVILLE WATER UTILITY water receives a grade of A (91/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has JANESVILLE WATER UTILITY detected?
73 contaminants were tested in JANESVILLE WATER UTILITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does JANESVILLE WATER UTILITY have any EPA violations?
Yes, JANESVILLE WATER UTILITY has 2 EPA violation(s) on record, with the most recent in 2016. Violation types include MON, MCL. 1 are health-based violations.
How many people does JANESVILLE WATER UTILITY serve?
JANESVILLE WATER UTILITY serves approximately 64,415 people, Wisconsin. The system provides water to 1 community: Janesville.
What type of water does JANESVILLE WATER UTILITY provide?
JANESVILLE WATER UTILITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1540127.
How does JANESVILLE WATER UTILITY compare to other utilities in Wisconsin?
JANESVILLE WATER UTILITY scores 91/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Wisconsin state page for a full comparison of water systems.