B78/100
SHAWANO WATERWORKS — Water Quality Report 2026
Serving 9,200 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI4590456
Violations
8
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 250.63 µg/L | — | Above Goal |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 SHAWANO WATERWORKS
Is SHAWANO WATERWORKS water safe to drink?
SHAWANO WATERWORKS water receives a grade of B (78/100), which is considered good. Out of 51 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SHAWANO WATERWORKS detected?
51 contaminants were tested in SHAWANO WATERWORKS's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does SHAWANO WATERWORKS have any EPA violations?
Yes, SHAWANO WATERWORKS has 8 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MCL, Other. 2 are health-based violations.
How many people does SHAWANO WATERWORKS serve?
SHAWANO WATERWORKS serves approximately 9,200 people, Wisconsin. The system provides water to 1 community: Shawano.
What type of water does SHAWANO WATERWORKS provide?
SHAWANO WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI4590456.
How does SHAWANO WATERWORKS compare to other utilities in Wisconsin?
SHAWANO WATERWORKS scores 78/100 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.