COUNTY REPORT IA

Hamilton County, Iowa

9 ZIP codes · Home Safety Score unavailable · 0 of 9 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 9 tracked ZIP records scored
9
ZIP Codes
$120K
Median Home Value

ZIP Code Risk Map

Water Quality Map: Hamilton County, Iowa

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: 13.5 (asthma 9.8%, diabetes 12.1%)

Modeled additional annual cost estimate per homeowner: $674, largest modeled factor: Flood

78% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 9.8% (national: 8.9%)
Diabetes 12.1% (national: 10.5%)
Obesity 36.5% (national: 32.4%)

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

Infrastructure Overview

1949
Median Build Year
78%
Pre-1980 Housing
60/100
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: $674

Flood $1,400/yr
Energy Code Gap $330/yr
Water / Lead $213/yr

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

Housing Age Distribution

7,135 housing units in Hamilton County

Pre-1940 39%
1940–1959 16%
1960–1979 23%
1980–1999 15%
2000+ 6%

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

Health Outcomes vs National Average

CDC PLACES data for Hamilton County residents

Asthma 9.8% (US avg: 8.9%)
Diabetes 12.1% (US avg: 11%)
Obesity 36.5% (US avg: 32.4%)

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

Water systems mapped to Hamilton County ZIP codes

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

All ZIP Codes in Hamilton County

9 ZIP codes tracked in Hamilton County.

# ZIP Code City Safety Score Grade Violations Home Value
1 50034 Blairsburg — — 0 $113K
2 50075 Ellsworth — — 0 $140K
3 50130 Jewell — — 0 $143K
4 50132 Kamrar — — 0 $120K
5 50231 Randall — — $106K
6 50246 Stanhope — — 0 $118K
7 50249 Stratford — — 0 $109K
8 50271 Williams — — 0 $138K
9 50595 Webster City — — 0 $129K

Recommended Buyer Guides for Hamilton County

Selection follows a fixed set of rules applied to local records: signals such as PFAS detections, lead action-level exceedances on record, a large share of pre-1978 housing, EPA Radon Zone 1, or a top flood or wildfire risk each add a related guide, and when none applies, general water testing and filtration guides are shown instead.

Deep Dive Reports

Detailed analysis for Hamilton County, Iowa

Overview

Hamilton County in Iowa covers 9 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.

The available EPA record reports 0 violations for 8 ZIP codes with a reported violation count.

← Back to Iowa 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 Hamilton County?
We map 3 public water systems to 9 ZIP codes in our data for Hamilton County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Hamilton County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Hamilton County is flood. Across all modeled risk factors, the estimated average additional annual cost is $674 per homeowner; actual costs vary by home.
How old are homes in Hamilton County?
The median home build year in Hamilton County is 1949. 78% 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). Hamilton County, Iowa Home Safety Profile. https://zipcheckup.com/county/iowa/hamilton/
BibTeX
@misc{zipcheckup-county-iowa-hamilton,
  author = {{ZipCheckup}},
  title  = {{Hamilton County, Iowa Home Safety Profile}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/iowa/hamilton/}
}

Page version: October 2026.

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