C53/100
PRAIRIE DU SAC WATERWORKS — Water Quality Report 2026
Serving 4,006 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1570100
Violations
12
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – June 4, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
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 PRAIRIE DU SAC WATERWORKS
Is PRAIRIE DU SAC WATERWORKS water safe to drink?
PRAIRIE DU SAC WATERWORKS water receives a grade of C (53/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 12 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PRAIRIE DU SAC WATERWORKS detected?
31 contaminants were tested in PRAIRIE DU SAC WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does PRAIRIE DU SAC WATERWORKS have any EPA violations?
Yes, PRAIRIE DU SAC WATERWORKS has 12 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MR. 8 are health-based violations.
How many people does PRAIRIE DU SAC WATERWORKS serve?
PRAIRIE DU SAC WATERWORKS serves approximately 4,006 people, Wisconsin. The system provides water to 1 community: Prairie Du Sac.
What type of water does PRAIRIE DU SAC WATERWORKS provide?
PRAIRIE DU SAC WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1570100.
How does PRAIRIE DU SAC WATERWORKS compare to other utilities in Wisconsin?
PRAIRIE DU SAC WATERWORKS scores 53/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Wisconsin state page for a full comparison of water systems.