PlainWater
Counties → Wisconsin

Walworth County, Wisconsin

Water Systems
252
Population Served
95,076
Total Violations
10,507
1,915 health-based
PFAS Detected
3
of 8 tested

Violation Analysis

77.8%
Systems with Violations
41.7
Avg Violations per System
18.2%
Health-Based Violations

Water Source Types

GW
50 systems (20%)

PFAS Contamination

8
Systems Tested
3
PFAS Detected
37.5%
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

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

No violations on record (6) One or more violations (44)

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
Whitewater Waterworks 14,000 135 Clean
Elkhorn Waterworks 10,317 291 Clean
Delavan Waterworks 8,451 88 Clean
Lake Geneva Utility Commission 7,107 182 Detected
East Troy Waterworks 5,054 91 Detected
Bloomfield, Village Of 4,071 171 Clean
Lake Como Sanitary Dist 1 3,038 97 -
Genoa City Waterworks 2,766 248 -
Williams Bay Waterworks 2,601 135 -
Walworth Waterworks 2,304 69 -
Geneva National Community Services 2,250 115 -
Fontana Water Utility 1,839 252 -
Darien Waterworks 1,573 153 -
Sharon Waterworks 1,549 327 -
WI DOT Rest Area 36 Lafayette 800 9 -
WI DOT Rest Area 35 Lafayette 800 1 -
Timber Lee Chris Ctr Redwood Commons 720 0 -
Calvary Community Church Original Bldg 1972 620 9 -
Birds Eye Foods 610 118 Clean
Emagine Geneva Lakes 592 1 -
Alpine Valley Resort 550 480 -
Mt Zion Christian Church 509 434 Clean
Linn Presbyterian Church 504 31 -
Country Estates Sanitary District Town of Lyons 1 500 380 -
Interlaken Resort and Village 500 63 -
Rosewood Dinner Theater 500 4 -
Lake Lawn Resort 3 Main Well 405 60 -
Pioneer Estates of Delavan 400 416 -
Camp Juniper Knoll 400 19 -
Delavan Club Condos 395 145 -
The Chapel Whitewater 325 0 -
Chapel on the Hill Church 303 19 -
Timber Lee Chris Ctr Blue Spruce 302 11 -
Camp Edwards YMCA Micklewright Lodge 300 0 -
Camp Edwards YMCA Kybo Well 300 11 -
Camp Edwards YMCA Runge Bldg 300 0 -
Camp Edwards YMCA Hoffer Lodge 300 4 -
Westshire Farms at the Lakes 300 8 -
Boxed and Burlap 300 8 -
Camp Edwards YMCA Cooper Rec Center 300 9 -
Camp Edwards YMCA Welcome Center 300 7 -
Faith Christian School 275 27 -
Dancing Horses Stage Barn 265 0 -
Dancing Horses Game Room 265 0 -
Tibbets Elementary School 248 24 -
Nippersink Country Club & Lodge 215 8 -
Camp Alice Chester Cedar Point 8 200 31 -
Camp Alice Chester Main Camp Well 3 200 7 -
Wandawega Country Club 200 25 -
Kountry Inn & Lockharts Service 200 2 -

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 Walworth County? ▼
Walworth County has 10,507 total drinking water violations across 252 water systems, of which 1,915 are health-based violations. 77.8% of systems have at least one violation.
How many people get water from Walworth County systems? ▼
Water systems in Walworth County serve approximately 95,076 people through 252 public water systems.
Has PFAS been detected in Walworth County water? ▼
Of 8 water systems tested for PFAS in Walworth County, 3 had PFAS detected (37.5% detection rate).
What types of water sources supply Walworth County? ▼
Water systems in Walworth 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. 18.2% of Walworth 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.