CITY REPORT WI HEALTH VIOLATIONS: 2

Fond Du Lac, WI: 2 Health Violations - Home Safety 64/100

3 ZIP codes · 4 water systems · Updated

ZipCheckup grade for Fond Du Lac: C.

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

Documented records place Fond Du Lac, WI in the middle grade tier.

How Fond Du Lac Compares

Fond Du Lac64/100
Wisconsin avg70/100
National avg73/100

Data: EPA SDWIS

3
ZIP Codes
4
Water Systems
2
ZIPs Linked to Systems with Violations
C · 64
Avg Safety Score
Zone 1
County Radon Potential (High)
$262K
Median Home Value
$300
Est. Remediation (0.1% of home value)

Fond Du Lac Water: The Quick Version

  • Your city's water systems recorded 9 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.0091 mg/L.
  • Homes built before 1986: 62% - older plumbing may contain lead solder.
  • Estimated remediation: $300 per household.
  • Health risk index (ZipCheckup composite of CDC data): 13.66.

Water Systems Serving Fond Du Lac

When a city is linked to 4 water systems, as Fond Du Lac, WI is in federal records, water in one neighborhood may come from a different system than in another. The 3 systems with the largest reported populations are shown below, and their compliance records are kept separately, so a violation logged for one does not describe the others.

Overview

We track home safety data for 3 ZIP codes in Fond Du Lac, Wisconsin, covering 4 community water systems serving approximately 63,351 people. The EPA snapshots used for this build directly map water systems to 2 of 3 ZIP codes.

2 of 2 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 2 health-based violations appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Fond Du Lac: C (64/100)

Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:

Factor What It Measures
Water Quality EPA violations and compliance history
PFAS MCL Screen UCMR 5 testing against the covered federal MCLs
Radon Risk EPA radon zone classification
Annual AQI EPA AirData county-year median with at least 90 observed days

Water Sources

Fond Du Lac water systems draw from: Groundwater.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0091 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

3 of 3 ZIP records with known zones are in EPA Radon Zone 1.

The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.

Top Contaminants

Contaminant Category Violations ZIPs Affected
Lead and Copper Rule Revisions Treatment Technique 9 2
Public Notice Rule Reporting 6 2
Combined Radium (-226 and -228) Radionuclides 3 2
Radium-226 Radionuclides 3 2
Radium-228 Radionuclides 3 2

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
54935 C 9 2 Fond Du Lac Waterworks
54937 C 9 2 Fond Du Lac Waterworks

All ZIP Codes in Fond Du Lac

Data Sources

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

CDC Health Data for Fond Du Lac

11%
Asthma (US: 9.8%)
11.5%
Diabetes (US: 10.4%)
15.6%
Poor Mental Health (US: 14.8%)

Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.

Compared to National Average

Asthma 11% ↑
Diabetes 11.5% ↑
Mental Health 15.6% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in Fond Du Lac

Lead and Copper Rule Revisions 9 violations
Treatment Technique
Public Notice Rule 6 violations
Reporting
Combined Radium (-226 and -228) 3 violations
Radionuclides · EPA regulatory level for the contaminant named above: 5 pCi/L

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

How Old Is Fond Du Lac's Housing Stock?

1975
Median Build Year
62%
Built Before 1986
44%
Built Before 1970
Galvanized Steel or Copper
Likely Pipe Material

With 62% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.

Source: U.S. Census Bureau American Community Survey (ACS).

Housing Age Profile

Pre-1986 homes make up a large part of Fond Du Lac's housing; median build year 1975.

1975
Median Year Built
62%
Pre-1986 (lead solder era; lead paint banned 1978)
44%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (44%) 1970–1986 (18%) Post-1986 (38%)

Over half of homes in Fond Du Lac were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.

Source: U.S. Census Bureau ACS B25034.

Fond Du Lac: Remediation Cost in Perspective

In Fond Du Lac, estimated remediation comes to 1% or less of the median home value.

Median Home Value
$262,000
Est. Remediation
$300
Remediation as % of home value 0.1%

Estimated remediation costs in Fond Du Lac can be compared with local home values. The $150–$600 estimated range can be set against the median property value; actual costs vary by home. Home values are 13% above the Wisconsin average.

Protecting Children from Lead in Fond Du Lac

62%
Homes Built Before 1986
0.0091
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Fond Du Lac

500
Total FEMA Flood Claims
$16,832
Avg Reported Sum With Payment Data
100%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Fond Du Lac contains 500 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $16,832. Among ZIP codes with claim records, 100% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $300 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.

What You Can Do in Fond Du Lac

  1. Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
  2. Install a certified water filter. For Lead and Copper Rule Revisions, listed in the water-quality records for Fond Du Lac: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
  3. Check your home's plumbing. With 62% of homes built before 1986, lead solder is a real possibility.

Deep Dive Reports

Detailed analysis for Fond Du Lac, WI

Frequently Asked Questions

What does the Home Safety Score mean for Fond Du Lac, WI?
Fond Du Lac has an average Home Safety Score of 64/100 (Grade C) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 9 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Fond Du Lac?
EPA records list 9 EPA violations, including 2 health-based violations for Fond Du Lac water systems. These water-system violations are shown for 3 mapped ZIP codes.
Does Fond Du Lac water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Fond Du Lac is 0.0091 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Fond Du Lac compare to Wisconsin average?
Fond Du Lac has an average Home Safety Score of 64/100, which is below the Wisconsin state average of 70/100 for the same model series.
How many water systems serve Fond Du Lac?
Our records map 4 water systems to 3 ZIP codes in Fond Du Lac. The related population figure in our data is approximately 63,351 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Fond Du Lac?
Estimated remediation cost per household in Fond Du Lac: $300; modeled range $150 to $600. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Fond Du Lac, WI: 2 Health Violations - Home Safety 64/100. https://zipcheckup.com/cities/wi/fond-du-lac/
BibTeX 
@misc{zipcheckup-cities-wi-fond-du-lac,
  author = {{ZipCheckup}},
  title  = {{Fond Du Lac, WI: 2 Health Violations - Home Safety 64/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/wi/fond-du-lac/}
}

Page version: October 2026.

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