B78/100
MARSHFIELD UTILITIES — Water Quality Report 2026
Serving 18,815 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI7720165
Violations
4
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.012 µg/L | 0.004 µg/L | Over Limit |
chlorate | 452.26 µg/L | — | Above Goal |
Lead (90th percentile) | 0.008 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 MARSHFIELD UTILITIES
Is MARSHFIELD UTILITIES water safe to drink?
MARSHFIELD UTILITIES water receives a grade of B (78/100), which is considered good. Out of 66 contaminants tested, 1 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MARSHFIELD UTILITIES detected?
66 contaminants were tested in MARSHFIELD UTILITIES's water. Notable contaminants include PFOS, Lead (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does MARSHFIELD UTILITIES have any EPA violations?
Yes, MARSHFIELD UTILITIES has 4 EPA violation(s) on record, with the most recent in 2020. Violation types include TT, MR. 1 are health-based violations.
How many people does MARSHFIELD UTILITIES serve?
MARSHFIELD UTILITIES serves approximately 18,815 people, Wisconsin. The system provides water to 1 community: Marshfield.
What type of water does MARSHFIELD UTILITIES provide?
MARSHFIELD UTILITIES sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI7720165.
How does MARSHFIELD UTILITIES compare to other utilities in Wisconsin?
MARSHFIELD UTILITIES scores 78/100 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.