PlainWater
Counties → Wisconsin

Columbia County, Wisconsin

Water Systems
141
Population Served
64,692
Total Violations
3,867
1,310 health-based
PFAS Detected
1
of 2 tested

Violation Analysis

80.9%
Systems with Violations
27.4
Avg Violations per System
33.9%
Health-Based Violations

Water Source Types

GW
50 systems (35%)

PFAS Contamination

2
Systems Tested
1
PFAS Detected
50.0%
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

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

No violations on record (10) One or more violations (40)

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
Portage Waterworks 10,437 139 Detected
Columbus Utilities 5,173 151 Clean
WI DOT Rest Area 12 Dekorra West Bound 3,255 53 -
Wisconsin Dells Waterworks 3,232 32 -
Lodi Waterworks 3,146 51 -
Poynette Waterworks 2,520 74 -
WI DOT Rest Area 11 Dekorra East Bound 2,505 64 -
Pardeeville Waterworks 2,151 58 -
Harmony Grove San Dist 1,950 25 -
Randolph Water Dept 1,800 202 -
Fall River Waterworks 1,793 15 -
Rio Waterworks 1,095 69 -
Loves Travel Stops Poynette 1,051 0 -
Cascade Mtn Ski - 93 Well Main 967 0 -
Petro Travel Plaza #403 915 25 -
Pride of America Campground - Main System Wells 1 2 and 4 912 8 -
McDonalds Restaurant Poynette 845 237 -
Arlington Waterworks 823 50 -
Northpoint Plaza Bp 809 8 -
Wyocena Waterworks 768 16 -
Cambria Waterworks 767 52 -
Crystal Lake RV Resort LLC 725 127 -
All Stop Plaza 718 8 -
Saddle Ridge Estates 700 31 -
Luckys Bar & Grille on the Lake 606 5 -
Zion Ev Lutheran Church of Leeds 507 17 -
WI DOT Wayside 17 West Point 500 6 -
Sunset Harbor 410 20 -
Cascade Mtn Ski - Daisy Restaurant Well 400 0 -
Friesland Waterworks 345 127 -
Silver Springs Campsites Hilltop Well 320 1 -
Silver Springs Campsites Office and Pool 320 1 -
Cimarolis Supper Club 316 11 -
Camp Wawbeek - Respite Camp Lodge 306 0 -
Camp Wawbeek Nature Center - Main Well 306 0 -
Hookers Resort 306 9 -
Camp Wawbeek - Respite Camp Rec Center 306 0 -
Remis Thirsty Moose 305 0 -
Indian Trails Campground - Bath House 300 6 -
Indian Trails Campground - East Hill 300 2 -
Bethlehem Lutheran Church 252 0 -
Lake Wisconsin Country Club 250 5 -
Trienda Holdings LLC 240 114 -
Fitzs on the Lake 215 0 -
Triple Play Sports Bar & Grill 208 74 -
Indian Trails Campground - Restaurant 206 2 -
Subway Sandwiches - Poynette 205 7 -
Anchor at Lakeside Bar & Grill 204 28 -
Interstate Easy Stop 203 4 -
Portage One Stop 203 0 -

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 Columbia County? ▼
Columbia County has 3,867 total drinking water violations across 141 water systems, of which 1,310 are health-based violations. 80.9% of systems have at least one violation.
How many people get water from Columbia County systems? ▼
Water systems in Columbia County serve approximately 64,692 people through 141 public water systems.
Has PFAS been detected in Columbia County water? ▼
Of 2 water systems tested for PFAS in Columbia County, 1 had PFAS detected (50.0% detection rate).
What types of water sources supply Columbia County? ▼
Water systems in Columbia 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. 33.9% of Columbia 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.