A86/100
WAUSAU WATERWORKS — Water Quality Report 2026
Serving 39,994 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI7370102
Violations
4
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 341.18 µg/L | — | Above Goal |
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2000.
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 WAUSAU WATERWORKS
Is WAUSAU WATERWORKS water safe to drink?
WAUSAU WATERWORKS water receives a grade of A (86/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has WAUSAU WATERWORKS detected?
66 contaminants were tested in WAUSAU WATERWORKS's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does WAUSAU WATERWORKS have any EPA violations?
Yes, WAUSAU WATERWORKS has 4 EPA violation(s) on record, with the most recent in 2000. Violation types include MCL, MR. 1 are health-based violations.
How many people does WAUSAU WATERWORKS serve?
WAUSAU WATERWORKS serves approximately 39,994 people, Wisconsin. The system provides water to 1 community: Wausau.
What type of water does WAUSAU WATERWORKS provide?
WAUSAU WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI7370102.
How does WAUSAU WATERWORKS compare to other utilities in Wisconsin?
WAUSAU WATERWORKS scores 86/100 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.