F0/100
PESHTIGO WATERWORKS — Water Quality Report 2026
Serving 3,420 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI4380442
Violations
28
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
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – August 6, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – August 20, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – February 6, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 1, 2023 – December 31, 2023Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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 PESHTIGO WATERWORKS
Is PESHTIGO WATERWORKS water safe to drink?
PESHTIGO WATERWORKS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 28 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PESHTIGO WATERWORKS detected?
31 contaminants were tested in PESHTIGO WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does PESHTIGO WATERWORKS have any EPA violations?
Yes, PESHTIGO WATERWORKS has 28 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MON. 18 are health-based violations.
How many people does PESHTIGO WATERWORKS serve?
PESHTIGO WATERWORKS serves approximately 3,420 people, Wisconsin. The system provides water to 1 community: Peshtigo.
What type of water does PESHTIGO WATERWORKS provide?
PESHTIGO WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI4380442.
How does PESHTIGO WATERWORKS compare to other utilities in Wisconsin?
PESHTIGO 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.