COUNTY REPORT IA

Delaware 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
$169K
Median Home Value

ZIP Code Risk Map

Water Quality Map: Delaware 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: 14.4 (asthma 9.9%, diabetes 12.5%)

Modeled additional annual cost estimate per homeowner: $514, largest modeled factor: Flood

65% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 9.9% (national: 8.9%)
Diabetes 12.5% (national: 10.5%)
Obesity 39.7% (national: 32.4%)

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

Infrastructure Overview

1967
Median Build Year
65%
Pre-1980 Housing
56/100
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: $514

Flood $600/yr
Water / Lead $400/yr
Energy Code Gap $270/yr

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

Housing Age Distribution

7,003 housing units in Delaware County

Pre-1940 31%
1940–1959 15%
1960–1979 19%
1980–1999 19%
2000+ 15%

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

Health Outcomes vs National Average

CDC PLACES data for Delaware County residents

Asthma 9.9% (US avg: 8.9%)
Diabetes 12.5% (US avg: 11%)
Obesity 39.7% (US avg: 32.4%)

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

Water systems mapped to Delaware County ZIP codes

1 community water system mapped to Delaware County ZIP codes; EPA may list more systems serving the county.

All ZIP Codes in Delaware County

9 ZIP codes tracked in Delaware County.

# ZIP Code City Safety Score Grade Violations Home Value
1 50654 Masonville — — $177K
2 52036 Delaware — — $140K
3 52038 Dundee — — $169K
4 52041 Earlville — — $212K
5 52050 Greeley — — $211K
6 52057 Manchester — — 0 $169K
7 52223 Delhi — — $195K
8 52237 Hopkinton — — $135K
9 52330 Ryan — — $164K

Recommended Buyer Guides for Delaware County

The guides listed here are chosen from this county's data, and the short note beside each one says why it made the list.

Overview

Delaware 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 1 ZIP code 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 Delaware County?
We map 1 public water system to the 9 ZIP codes of Delaware County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in Delaware County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in Delaware County is flood. Across all modeled risk factors, the estimated average additional annual cost is $514 per homeowner; actual costs vary by home.
How old are homes in Delaware County?
The median home build year in Delaware County is 1967. 65% 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). Delaware County, Iowa Home Safety Profile. https://zipcheckup.com/county/iowa/delaware/
BibTeX
@misc{zipcheckup-county-iowa-delaware,
  author = {{ZipCheckup}},
  title  = {{Delaware County, Iowa Home Safety Profile}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/iowa/delaware/}
}

Page version: October 2026.

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