COUNTY REPORT WI

Ozaukee County, Wisconsin

Name: Home Safety Data for Ozaukee County, Wisconsin
Creator: ZipCheckup
License: https://creativecommons.org/licenses/by/4.0/

8 ZIP codes · Avg score 71/100 · Grade B

ZipCheckup grade for Ozaukee County: B.

This ZIP has a few items worth a quick check.

Residents of Ozaukee County can read the A-B grade as a starting point and then open their own ZIP report, one of 8 on this site.

How Ozaukee County Compares

Ozaukee County71/100

Wisconsin avg70/100

National avg73/100

How Ozaukee County Compares

County Grade

71/100

Avg Safety Score

ZIP Codes

Water Systems

Ozaukee County scores 1 points above the Wisconsin state average (70/100) and 2 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

County Grade

Avg Safety Score

ZIP Codes

Cedarburg

Best ZIP: 53012 (81/100)

Saukville

Lowest ZIP: 53080 (65/100)

$323K

Median Home Value

$514

Avg Remediation (0.16% of home value)

ZIP Code Risk Map

Water Quality Map: Ozaukee 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: 11.4 (asthma 10.2%, diabetes 10.1%)

Modeled additional annual cost estimate per homeowner: $1,441, largest modeled factor: Flood

55% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.2% (national: 8.9%)

Diabetes 10.1% (national: 10.5%)

Obesity 30.3% (national: 32.4%)

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

Infrastructure Overview

1975

Median Build Year

55%

Pre-1980 Housing

38/100

Infrastructure Stress Indicator

13%

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: $1,441

Flood $975/yr

Energy Code Gap $304/yr

Water / Lead $163/yr

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

Housing Age Distribution

39,469 housing units in Ozaukee County

Pre-1940 12%

1940–1959 14%

1960–1979 29%

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 Ozaukee County

$323K

Median Home Value

$514

Est. Remediation Cost

0.2%

of Home Value

Remediation as % of home value low burden

Modeled remediation costs in Ozaukee 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 Ozaukee County residents

Asthma 10.2% (US avg: 8.9%)

Diabetes 10.1% (US avg: 11%)

Obesity 30.3% (US avg: 32.4%)

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

Water systems mapped to Ozaukee County ZIP codes

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

Port Washington Waterworks
Serves ~12,853 people 2 violations

C
Cedarburg L & W Commission
Serves ~12,500 people

C
Grafton Waterworks
Serves ~12,269 people

C
Mequon Water Utility
Serves ~11,152 people

B
Jackson Waterworks
Serves ~7,844 people 3 violations

B
Saukville Waterworks
Serves ~4,268 people

C

Show all 8 water systems

Belgium Waterworks
Serves ~2,493 people 2 violations

C
Fredonia Waterworks
Serves ~2,279 people 4 violations

C

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

Systems with the most violations in Ozaukee County

5 water systems with violations in EPA records.

Fredonia Waterworks
Serves ~2,279 people 4 violations

C
Mequon Trail Townhomes
Serves ~615 people 4 violations

B
Jackson Waterworks
Serves ~7,844 people 3 violations

B
Port Washington Waterworks
Serves ~12,853 people 2 violations

C
Belgium Waterworks
Serves ~2,493 people 2 violations

C

All ZIP Codes in Ozaukee County

8 ZIP codes tracked in Ozaukee County.

#	ZIP Code	City	Safety Score	Grade	Violations	Home Value
1	53012	Cedarburg	81	B	3 (1 health)	$391K
2	53097	Mequon	79	B	5 (1 health)	$526K
3	53024	Grafton	67	C	2	$354K
4	53092	Thiensville	67	C	33 (3 health)	$440K
5	53074	Port Washington	65	C	4 (1 health)	$276K
6	53080	Saukville	65	C	4	$292K
7	53004	Belgium	—	—	6 (1 health)	$245K
8	53021	Fredonia	—	—	4	$278K

Recommended Buyer Guides for Ozaukee 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.

Best Lead Paint Test Kits — 55% of homes built before 1980
Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Best Sump Pumps — Flood is the top compound risk factor
Best Mold Test Kits — Flood-driven moisture and mold risk

Deep Dive Reports

Detailed analysis for Ozaukee County, Wisconsin

💧

Water Quality

EPA violations, contaminant trends, and enforcement actions across the county

⚠️

Lead Risk

Lead exposure scores, housing age analysis, and LCR testing trends

🏠

Home Affordability

Remediation costs vs. home values, equity trap analysis by ZIP

$514 avg remediation

🌊

Flood Risk

NFIP claim history and recorded rated-zone context across the county, plus FEMA property-map guidance

Overview

Ozaukee County in Wisconsin covers 8 tracked ZIP records with an average Home Safety Score of B (71/100) across 6 scored records.

8 of 8 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 health-based violations appear in the available health breakdown.

← Back to Wisconsin Home Safety Profile

Data Sources

Water quality: EPA Safe Drinking Water Information System (SDWIS)
PFAS screening: EPA UCMR 5
Radon zones: EPA Map of Radon Zones
Air quality: EPA AirData annual AQI
Home values: U.S. Census Bureau ACS (median estimates by ZCTA)

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

Frequently Asked Questions

Is water safe in Ozaukee County?

Ozaukee County receives an average Home Safety grade of B from its scored ZIP records (8 ZIP codes tracked); this is a composite index, not a tap-water test.

How many water systems serve Ozaukee County?

We map 16 public water systems to 8 ZIP codes in our data for Ozaukee County. EPA may list more systems serving the county, so this is not a full count.

What is the biggest environmental risk in Ozaukee County?

In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Ozaukee County is flood. Across all modeled risk factors, the estimated average additional annual cost is $1,441 per homeowner; actual costs vary by home.

How old are homes in Ozaukee County?

The median home build year in Ozaukee County is 1975. 55% 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 Ozaukee County compare to Wisconsin?

Ozaukee County has an average Home Safety Score of 71/100 under model 4.0.0, which is at or above the Wisconsin state average of 70/100.

Explore More

Flood Risk Rankings 2026 Lead Risk Rankings 2026 Water Safety Rankings 2026 Home Safety Rankings 2026 Water Filter Matcher Find the right filter for your water Home Safety Score Full safety breakdown by ZIP

Wisconsin State Overview →