COUNTY REPORT IL

DeKalb County, Illinois

12 ZIP codes · Home Safety Score unavailable · 0 of 12 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 12 tracked ZIP records scored
12
ZIP Codes
$239K
Median Home Value
$500
Avg Remediation (0.21% of home value)

ZIP Code Risk Map

Water Quality Map: DeKalb 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: 11.8 (asthma 10.4%, diabetes 10.3%)

Modeled additional annual cost estimate per homeowner: $1,688, largest modeled factor: Flood

53% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 10.4% (national: 8.9%)
Diabetes 10.3% (national: 10.5%)
Obesity 35.1% (national: 32.4%)

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

Infrastructure Overview

1973
Median Build Year
53%
Pre-1980 Housing
43/100
Infrastructure Stress Indicator
58%
ZIPs with High Infrastructure Stress
Low
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: $1,688

Flood $956/yr
Energy Code Gap $450/yr
Sea Level Rise $400/yr

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

Housing Age Distribution

41,737 housing units in DeKalb County

Pre-1940 15%
1940–1959 9%
1960–1979 29%
1980–1999 24%
2000+ 23%

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

Water Safety Affordability

How much it costs to fix water issues relative to home values in DeKalb County

$239K
Median Home Value
$500
Est. Remediation Cost
0.2%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in DeKalb County can be compared with the median property value; actual costs vary by property.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for DeKalb County residents

Asthma 10.4% (US avg: 8.9%)
Diabetes 10.3% (US avg: 11%)
Obesity 35.1% (US avg: 32.4%)

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

Water systems mapped to DeKalb County ZIP codes

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

  • Dekalb
    Serves ~40,290 people 2 violations
  • Belvidere
    Serves ~25,339 people 1 violation
  • Sycamore
    Serves ~18,500 people 7 violations
  • Plano
    Serves ~12,600 people 6 violations
  • Hampshire
    Serves ~7,758 people 2 violations
  • Sandwich
    Serves ~7,156 people 2 violations
Show all 8 water systems

10 water systems mapped to DeKalb County ZIP codes in our data; EPA may list more systems serving the county.

Systems with the most violations in DeKalb County

5 water systems with violations in EPA records.

All ZIP Codes in DeKalb County

12 ZIP codes tracked in DeKalb County.

# ZIP Code City Safety Score Grade Violations Home Value
1 60111 Clare — — 7 $374K
2 60112 Cortland — — 3 $202K
3 60115 Dekalb — — 25 $206K
4 60135 Genoa — — 8 $238K
5 60145 Kingston — — 8 $252K
6 60146 Kirkland — — 1 $209K
7 60150 Malta — — $184K
8 60178 Sycamore — — 13 $263K
9 60520 Hinckley — — $293K
10 60548 Sandwich — — 8 $240K
11 60550 Shabbona — — $193K
12 60556 Waterman — — $243K

Recommended Buyer Guides for DeKalb 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.

Overview

DeKalb County in Illinois covers 12 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.

8 of 8 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 DeKalb County?
We map 10 public water systems to 12 ZIP codes in our data for DeKalb County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in DeKalb County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in DeKalb County is flood. Across all modeled risk factors, the estimated average additional annual cost is $1,688 per homeowner; actual costs vary by home.
How old are homes in DeKalb County?
The median home build year in DeKalb County is 1973. 53% 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). DeKalb County, Illinois Home Safety Profile. https://zipcheckup.com/county/illinois/dekalb/
BibTeX
@misc{zipcheckup-county-illinois-dekalb,
  author = {{ZipCheckup}},
  title  = {{DeKalb County, Illinois Home Safety Profile}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/illinois/dekalb/}
}

Page version: October 2026.

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