COUNTY REPORT IL

Mason County, Illinois

8 ZIP codes · Home Safety Score unavailable · 0 of 8 tracked ZIP records scored

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

Unavailable
0 of 8 tracked ZIP records scored
8
ZIP Codes
$104K
Median Home Value

ZIP Code Risk Map

Water Quality Map: Mason County, Illinois

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: 14.7 (asthma 10.5%, diabetes 13.3%)

Modeled additional annual cost estimate per homeowner: $1,478, largest modeled factor: Flood

80% 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 13.3% (national: 10.5%)
Obesity 37.3% (national: 32.4%)

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

Infrastructure Overview

1962
Median Build Year
80%
Pre-1980 Housing
51/100
Infrastructure Stress Indicator
100%
ZIPs with High Infrastructure Stress
High
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: $1,478

Flood $1,067/yr
Energy Code Gap $540/yr
Water / Lead $275/yr

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

Housing Age Distribution

5,671 housing units in Mason County

Pre-1940 31%
1940–1959 19%
1960–1979 30%
1980–1999 12%
2000+ 8%

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

Health Outcomes vs National Average

CDC PLACES data for Mason County residents

Asthma 10.5% (US avg: 8.9%)
Diabetes 13.3% (US avg: 11%)
Obesity 37.3% (US avg: 32.4%)

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

Water systems mapped to Mason County ZIP codes

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

  • Havana
    Serves ~2,963 people 1 violation
  • Mason City
    Serves ~2,393 people 1 violation
  • Manito
    Serves ~1,552 people 2 violations

Systems with the most violations in Mason County

3 water systems with violations in EPA records.

  • Manito
    Serves ~1,552 people 2 violations
  • Havana
    Serves ~2,963 people 1 violation
  • Mason City
    Serves ~2,393 people 1 violation

All ZIP Codes in Mason County

8 ZIP codes tracked in Mason County.

# ZIP Code City Safety Score Grade Violations Home Value
1 61532 Forest City — — 2 $110K
2 61567 Topeka — — 2 $133K
3 62617 Bath — — $79K
4 62633 Easton — — $93K
5 62644 Havana — — 1 $105K
6 62655 Kilbourne — — $116K
7 62664 Mason City — — 1 $103K
8 62682 San Jose — — $74K

Recommended Buyer Guides for Mason County

Read the note next to each link: it gives the reason, such as a radon zone designation or housing age, that led to the recommendation.

Overview

Mason County in Illinois covers 8 tracked ZIP records. No Home Safety Score is published because the required model evidence is incomplete for every tracked record; missing evidence is not treated as zero.

4 of 4 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. The available record reports no health-based violations for this measured scope.

← Back to Illinois Home Safety Profile

Data Sources

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

Frequently Asked Questions

How many water systems serve Mason County?
We map 3 public water systems to 8 ZIP codes in our data for Mason County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Mason County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Mason County is flood. Across all modeled risk factors, the estimated average additional annual cost is $1,478 per homeowner; actual costs vary by home.
How old are homes in Mason County?
The median home build year in Mason County is 1962. 80% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.

How to cite this page

APA ZipCheckup. (2026). Mason County, Illinois Home Safety Profile. https://zipcheckup.com/county/illinois/mason/
BibTeX
@misc{zipcheckup-county-illinois-mason,
  author = {{ZipCheckup}},
  title  = {{Mason County, Illinois Home Safety Profile}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/illinois/mason/}
}

Page version: October 2026.

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