B75/100
MAUSTON WATERWORKS — Water Quality Report 2026
Serving 4,456 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI7290129
Violations
6
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.53 mg/L | 1.30 mg/L | Over Limit |
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 – April 16, 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 MAUSTON WATERWORKS
Is MAUSTON WATERWORKS water safe to drink?
MAUSTON WATERWORKS water receives a grade of B (75/100), which is considered good. Out of 32 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MAUSTON WATERWORKS detected?
32 contaminants were tested in MAUSTON 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 MAUSTON WATERWORKS have any EPA violations?
Yes, MAUSTON WATERWORKS has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MR. 2 are health-based violations.
How many people does MAUSTON WATERWORKS serve?
MAUSTON WATERWORKS serves approximately 4,456 people, Wisconsin. The system provides water to 1 community: Mauston.
What type of water does MAUSTON WATERWORKS provide?
MAUSTON WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI7290129.
How does MAUSTON WATERWORKS compare to other utilities in Wisconsin?
MAUSTON WATERWORKS scores 75/100 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.