F0/100
WINTERSET MUNICIPAL WATERWORKS — Water Quality Report 2026
Serving 5,428 people · Iowa
Water Source
Surface Water
County
—
System ID
IA6171029
Violations
31
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.51 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 WINTERSET MUNICIPAL WATERWORKS
Is WINTERSET MUNICIPAL WATERWORKS water safe to drink?
WINTERSET MUNICIPAL WATERWORKS water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 31 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WINTERSET MUNICIPAL WATERWORKS detected?
52 contaminants were tested in WINTERSET MUNICIPAL WATERWORKS's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does WINTERSET MUNICIPAL WATERWORKS have any EPA violations?
Yes, WINTERSET MUNICIPAL WATERWORKS has 31 EPA violation(s) on record, with the most recent in 2018. Violation types include TT, MCL, MR. 20 are health-based violations.
How many people does WINTERSET MUNICIPAL WATERWORKS serve?
WINTERSET MUNICIPAL WATERWORKS serves approximately 5,428 people, Iowa. The system provides water to 1 community: Winterset.
What type of water does WINTERSET MUNICIPAL WATERWORKS provide?
WINTERSET MUNICIPAL WATERWORKS sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IA6171029.
How does WINTERSET MUNICIPAL WATERWORKS compare to other utilities in Iowa?
WINTERSET MUNICIPAL WATERWORKS scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Iowa state page for a full comparison of water systems.