COUNTY REPORT IL

Mercer County, Illinois

11 ZIP codes · Home Safety Score unavailable · 0 of 11 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 11 tracked ZIP records scored
11
ZIP Codes
$127K
Median Home Value

ZIP Code Risk Map

Water Quality Map: Mercer 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: 14.2 (asthma 10.3%, diabetes 12.4%)

Modeled additional annual cost estimate per homeowner: $857, largest modeled factor: Flood

77% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.3% (national: 8.9%)
Diabetes 12.4% (national: 10.5%)
Obesity 38.6% (national: 32.4%)

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

Infrastructure Overview

1953
Median Build Year
77%
Pre-1980 Housing
52/100
Infrastructure Stress Indicator
91%
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: $857

Flood $600/yr
Energy Code Gap $589/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

6,815 housing units in Mercer County

Pre-1940 33%
1940–1959 17%
1960–1979 27%
1980–1999 14%
2000+ 8%

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

Health Outcomes vs National Average

CDC PLACES data for Mercer County residents

Asthma 10.3% (US avg: 8.9%)
Diabetes 12.4% (US avg: 11%)
Obesity 38.6% (US avg: 32.4%)

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

Water systems mapped to Mercer County ZIP codes

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

Systems with the most violations in Mercer County

1 water system with violations in EPA records.

All ZIP Codes in Mercer County

11 ZIP codes tracked in Mercer County.

# ZIP Code City Safety Score Grade Violations Home Value
1 61231 Aledo — — 1 $141K
2 61260 Joy — — $84K
3 61263 Matherville — — $136K
4 61276 Preemption — — —
5 61279 Reynolds — — $165K
6 61281 Sherrard — — 1 $223K
7 61442 Keithsburg — — $65K
8 61465 New Windsor — — $110K
9 61466 North Henderson — — $90K
10 61476 Seaton — — $127K
11 61486 Viola — — $126K

Recommended Buyer Guides for Mercer 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

Mercer County in Illinois covers 11 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.

2 of 2 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 Mercer County?
We map 2 public water systems to 11 ZIP codes in our data for Mercer County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Mercer County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Mercer County is flood. Across all modeled risk factors, the estimated average additional annual cost is $857 per homeowner; actual costs vary by home.
How old are homes in Mercer County?
The median home build year in Mercer County is 1953. 77% 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). Mercer County, Illinois Home Safety Profile. https://zipcheckup.com/county/illinois/mercer/
BibTeX
@misc{zipcheckup-county-illinois-mercer,
  author = {{ZipCheckup}},
  title  = {{Mercer County, Illinois Home Safety Profile}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/illinois/mercer/}
}

Page version: October 2026.

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