COUNTY REPORT WI

Sauk County, Wisconsin

13 ZIP codes · Avg score 81/100 · Grade B

ZipCheckup grade for Sauk County: B.

This ZIP has a few items worth a quick check.

Residents of Sauk County can read the A-B grade as a starting point and then open their own ZIP report, one of 13 on this site.

How Sauk County Compares

Sauk County81/100
Wisconsin avg70/100
National avg73/100

How Sauk County Compares

B
County Grade
81/100
Avg Safety Score
13
ZIP Codes
8
Water Systems

Sauk County scores 11 points above the Wisconsin state average (70/100) and 8 points above the national average (73/100).

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

B
County Grade
81
Avg Safety Score
13
ZIP Codes
Best ZIP: 53913 (83/100)
Lowest ZIP: 53578 (78/100)
$241K
Median Home Value
$1,990
Avg Remediation (0.83% of home value)

ZIP Code Risk Map

Water Quality Map: Sauk 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: 13.6 (asthma 10.8%, diabetes 12.3%)

Modeled additional annual cost estimate per homeowner: $822, largest modeled factor: Flood

49% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.8% (national: 8.9%)
Diabetes 12.3% (national: 10.5%)
Obesity 40.4% (national: 32.4%)

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

Infrastructure Overview

1976
Median Build Year
49%
Pre-1980 Housing
42/100
Infrastructure Stress Indicator
46%
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: $822

Flood $829/yr
Energy Code Gap $344/yr
Water / Lead $220/yr

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

Housing Age Distribution

25,054 housing units in Sauk County

Pre-1940 21%
1940–1959 10%
1960–1979 18%
1980–1999 27%
2000+ 25%

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 Sauk County

$241K
Median Home Value
$1,990
Est. Remediation Cost
0.8%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in Sauk 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 Sauk County residents

Asthma 10.8% (US avg: 8.9%)
Diabetes 12.3% (US avg: 11%)
Obesity 40.4% (US avg: 32.4%)

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

Water systems mapped to Sauk County ZIP codes

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

Show all 8 water systems

Systems with the most violations in Sauk County

4 water systems with violations in EPA records.

All ZIP Codes in Sauk County

13 ZIP codes tracked in Sauk County.

# ZIP Code City Safety Score Grade Violations Home Value
1 53913 Baraboo 83 B 1 $215K
2 53959 Reedsburg 83 B 1 $241K
3 53578 Prairie Du Sac 78 B 7 (3 health) $334K
4 53561 Merrimac — — $407K
5 53577 Plain — — $248K
6 53937 Hillpoint — — $262K
7 53940 Lake Delton — — —
8 53941 La Valle — — $253K
9 53942 Lime Ridge — — $120K
10 53943 Loganville — — $231K
11 53951 North Freedom — — 1 $186K
12 53958 Reedsburg — — —
13 53961 Rock Springs — — 1 $200K

Recommended Buyer Guides for Sauk County

Nothing on this list means a problem exists in your own home: the matches are drawn from county- and ZIP-level records, so a guide shows up because of an area signal, and only testing at your tap describes a specific household.

Overview

Sauk County in Wisconsin covers 13 tracked ZIP records with an average Home Safety Score of B (81/100) across 3 scored records.

5 of 5 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 3 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 Sauk County?
Sauk County receives an average Home Safety grade of B from its scored ZIP records (13 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve Sauk County?
We map 8 public water systems to 13 ZIP codes in our data for Sauk County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Sauk County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Sauk County is flood. Across all modeled risk factors, the estimated average additional annual cost is $822 per homeowner; actual costs vary by home.
How old are homes in Sauk County?
The median home build year in Sauk County is 1976. 49% 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 Sauk County compare to Wisconsin?
Sauk County has an average Home Safety Score of 81/100 under model 4.0.0, which is at or above the Wisconsin state average of 70/100.

How to cite this page

APA ZipCheckup. (2026). Sauk County, WI: HSS 81/100; Lead Above EPA Action Level. https://zipcheckup.com/county/wisconsin/sauk/
BibTeX
@misc{zipcheckup-county-wisconsin-sauk,
  author = {{ZipCheckup}},
  title  = {{Sauk County, WI: HSS 81/100; Lead Above EPA Action Level}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/wisconsin/sauk/}
}

Page version: October 2026.

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