PlainWater
Counties → Wisconsin

Marathon County, Wisconsin

Water Systems
195
Population Served
103,485
Total Violations
5,385
1,533 health-based
PFAS Detected
4
of 5 tested

Violation Analysis

81.0%
Systems with Violations
27.6
Avg Violations per System
28.5%
Health-Based Violations

Water Source Types

GW
50 systems (26%)

PFAS Contamination

5
Systems Tested
4
PFAS Detected
80.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Marathon Wisconsin water systems by violation status, EPA SDWIS records.

No violations on record (5) One or more violations (45)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Wausau Waterworks 39,994 16 Detected
Weston Municipal Utilities 16,000 159 Detected
Kronenwetter Water & Sewer Utility 6,931 16 Clean
Rib Mountain Water Utility 6,398 10 Detected
Mosinee Waterworks 3,406 28 -
Rothschild Waterworks 3,190 176 -
Abbotsford Waterworks 2,502 121 -
Schofield Waterworks 2,205 47 Detected
Spencer Waterworks 1,848 41 -
Colby Waterworks 1,829 5 -
Marathon City Waterworks 1,695 27 -
Stratford Waterworks 1,643 129 -
Edgar Waterworks 1,491 49 -
Mosinee East System 1,046 0 -
Athens Waterworks 1,025 170 -
Holy Family Catholic Church 800 0 -
Riverside Elementary School 590 106 -
Hatley Waterworks 550 259 -
Land O Lakes Inc Cheese Div 350 23 -
St Ladislaus 300 10 -
New Hope Community Church 300 26 -
Maine Water Utility 271 155 -
Maine Elementary School 255 506 -
Stoney Acres 254 0 -
St Thomas Catholic Church 225 17 -
Ntc Ag Center 225 6 -
Mullins Cheese Factory 200 123 -
Red Granite Bar 175 2 -
Hewitt Texas Elementary School 151 248 -
Maizefield Mhc (Manufactured Home Community) 145 104 -
Bethany Lutheran Church 140 31 -
Boardwalk Mhc LLC 130 32 -
Belvedere Supper Club 125 2 -
Deer Trail Village 120 399 -
Knowlton House Distillery 120 4 -
Ntc Vet Tech Lab 115 2 -
Obrien Steel 108 154 -
Mullins Cheese Retail Store 106 4 -
Trappe River Golf Club 100 10 -
Trails End Lodge 100 4 -
Lake Dubay Shores 100 46 -
G S a Camp del O Claire 100 13 -
Maple Grove Charter School 100 11 -
Pine Valley Golf Course 100 2 -
Mission Evangelical 100 12 -
Steve & Dianes Memories Ballroom 100 0 -
Veritas Steel 1 89 39 -
Veritas Steel 2 89 53 -
Wild Steer Diner 80 0 -
Camp Sturtevant 1 80 7 -

Other Counties in Wisconsin

Milwaukee County
85 systems · 953,104 served · 2,602 violations
Dane County
301 systems · 517,785 served · 7,065 violations
Waukesha County
590 systems · 322,690 served · 24,998 violations
Brown County
149 systems · 246,872 served · 2,891 violations
Outagamie County
107 systems · 179,535 served · 1,999 violations
Racine County
195 systems · 179,476 served · 10,597 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Marathon County? ▼
Marathon County has 5,385 total drinking water violations across 195 water systems, of which 1,533 are health-based violations. 81.0% of systems have at least one violation.
How many people get water from Marathon County systems? ▼
Water systems in Marathon County serve approximately 103,485 people through 195 public water systems.
Has PFAS been detected in Marathon County water? ▼
Of 5 water systems tested for PFAS in Marathon County, 4 had PFAS detected (80.0% detection rate).
What types of water sources supply Marathon County? ▼
Water systems in Marathon County use GW (50 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 28.5% of Marathon County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.