F0/100
MUKWONAGO WATERWORKS — Water Quality Report 2026
Serving 8,190 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI2680209
Violations
108
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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 MUKWONAGO WATERWORKS
Is MUKWONAGO WATERWORKS water safe to drink?
MUKWONAGO WATERWORKS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 108 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MUKWONAGO WATERWORKS detected?
38 contaminants were tested in MUKWONAGO WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MUKWONAGO WATERWORKS have any EPA violations?
Yes, MUKWONAGO WATERWORKS has 108 EPA violation(s) on record, with the most recent in 2015. Violation types include MR, Other, MCL. 15 are health-based violations.
How many people does MUKWONAGO WATERWORKS serve?
MUKWONAGO WATERWORKS serves approximately 8,190 people, Wisconsin. The system provides water to 1 community: Mukwonago.
What type of water does MUKWONAGO WATERWORKS provide?
MUKWONAGO WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI2680209.
How does MUKWONAGO WATERWORKS compare to other utilities in Wisconsin?
MUKWONAGO WATERWORKS scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Wisconsin state page for a full comparison of water systems.