COUNTY REPORT WI

Walworth County, Wisconsin

15 ZIP codes · Avg score 55/100 · Grade C

ZipCheckup grade for Walworth County: C.

A mixed picture - some signals here are worth your attention.

Somewhere in the middle: that is where the composite score for Walworth County lands, across 15 tracked ZIP codes.

How Walworth County Compares

Walworth County55/100
Wisconsin avg70/100
National avg73/100

How Walworth County Compares

C
County Grade
55/100
Avg Safety Score
15
ZIP Codes
19
Water Systems

Walworth County scores 15 points below the Wisconsin state average (70/100) and 18 points below the national average (73/100).

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData

C
County Grade
55
Avg Safety Score
15
ZIP Codes
Best ZIP: 53120 (67/100)
Lowest ZIP: 53147 (33/100)
$263K
Median Home Value
$2,248
Avg Remediation (0.85% of home value)

ZIP Code Risk Map

Water Quality Map: Walworth County, Wisconsin

Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.

A B C D F

Key Risk Factors

Health risk index: 12.7 (asthma 10.5%, diabetes 11.2%)

Modeled additional annual cost estimate per homeowner: $697, largest modeled factor: Flood

54% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.5% (national: 8.9%)
Diabetes 11.2% (national: 10.5%)
Obesity 38.4% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1972
Median Build Year
54%
Pre-1980 Housing
47/100
Infrastructure Stress Indicator
71%
ZIPs with High Infrastructure Stress
Low
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $697

Flood $333/yr
Energy Code Gap $312/yr
Water / Lead $309/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

53,658 housing units in Walworth County

Pre-1940 17%
1940–1959 14%
1960–1979 23%
1980–1999 25%
2000+ 20%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Walworth County

$263K
Median Home Value
$2,248
Est. Remediation Cost
0.9%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Walworth County can be compared with the median property value; actual costs vary by property.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Walworth County residents

Asthma 10.5% (US avg: 8.9%)
Diabetes 11.2% (US avg: 11%)
Obesity 38.4% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems mapped to Walworth County ZIP codes

8 community water systems mapped to Walworth County ZIP codes; EPA may list more systems serving the county.

Show all 8 water systems

19 water systems mapped to Walworth County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in Walworth County

5 water systems with violations in EPA records.

All ZIP Codes in Walworth County

15 ZIP codes tracked in Walworth County.

# ZIP Code City Safety Score Grade Violations Home Value
1 53120 East Troy 67 C 0 $310K
2 53190 Whitewater 66 C 3 $247K
3 53121 Elkhorn 65 C 4 (1 health) $288K
4 53114 Darien 50 D 40 (1 health) $226K
5 53115 Delavan 50 D 69 (2 health) $226K
6 53147 Lake Geneva 33 F 63 (5 health) $337K
7 53125 Fontana — — 18 (2 health) $577K
8 53128 Genoa City — — 43 (4 health) $233K
9 53148 Lyons — — —
10 53157 Pell Lake — — —
11 53176 Springfield — — —
12 53184 Walworth — — 22 (2 health) $279K
13 53191 Williams Bay — — 9 (1 health) $369K
14 53195 Zenda — — $174K
15 53585 Sharon — — 40 (1 health) $207K

Recommended Buyer Guides for Walworth County

The mix of guides changes from county to county.

Overview

Walworth County in Wisconsin covers 15 tracked ZIP records with an average Home Safety Score of C (55/100) across 6 scored records.

10 of 11 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 8 health-based violations appear in the available health breakdown.

← Back to Wisconsin Home Safety Profile

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Walworth County?
Walworth County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Walworth County?
We map 19 public water systems to 15 ZIP codes in our data for Walworth County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Walworth County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Walworth County is flood. Across all modeled risk factors, the estimated average additional annual cost is $697 per homeowner; actual costs vary by home.
How old are homes in Walworth County?
The median home build year in Walworth County is 1972. 54% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does Walworth County compare to Wisconsin?
Walworth County has an average Home Safety Score of 55/100 under model 4.0.0, which is below the Wisconsin state average of 70/100.

How to cite this page

APA ZipCheckup. (2026). Walworth County, WI: HSS 55/100; PFAS Found in Water. https://zipcheckup.com/county/wisconsin/walworth/
BibTeX
@misc{zipcheckup-county-wisconsin-walworth,
  author = {{ZipCheckup}},
  title  = {{Walworth County, WI: HSS 55/100; PFAS Found in Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/wisconsin/walworth/}
}

Page version: October 2026.

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