COUNTY REPORT IL

DuPage County, Illinois

51 ZIP codes · Avg score 76/100 · Grade B

ZipCheckup grade for DuPage County: B.

This ZIP has a few items worth a quick check.

Residents of DuPage County can read the A-B grade as a starting point and then open their own ZIP report, one of 51 on this site.

How DuPage County Compares

DuPage County76/100
Illinois avg68/100
National avg73/100

How DuPage County Compares

B
County Grade
76/100
Avg Safety Score
51
ZIP Codes
54
Water Systems

DuPage County scores 8 points above the Illinois state average (68/100) and 3 points above the national average (73/100).

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

B
County Grade
76
Avg Safety Score
51
ZIP Codes
Best ZIP: 60187 (82/100)
Lowest ZIP: 60137 (58/100)
$387K
Median Home Value
$408
Avg Remediation (0.11% of home value)

ZIP Code Risk Map

Water Quality Map: DuPage 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: 10.7 (asthma 8.9%, diabetes 10%)

Modeled additional annual cost estimate per homeowner: $1,961, largest modeled factor: Flood

55% of homes built before 1980 (lead paint was banned for residential use in 1978)

County Health Indicators vs National Average

Asthma 8.9% (national: 8.9%)
Diabetes 10% (national: 10.5%)
Obesity 29.2% (national: 32.4%)

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

Infrastructure Overview

1973
Median Build Year
55%
Pre-1980 Housing
36/100
Infrastructure Stress Indicator
36%
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: $1,961

Flood $1,617/yr
Energy Code Gap $484/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

365,885 housing units in DuPage County

Pre-1940 6%
1940–1959 13%
1960–1979 36%
1980–1999 33%
2000+ 14%

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 DuPage County

$387K
Median Home Value
$408
Est. Remediation Cost
0.1%
of Home Value
Remediation as % of home value low burden

Modeled remediation costs in DuPage 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 DuPage County residents

Asthma 8.9% (US avg: 8.9%)
Diabetes 10% (US avg: 11%)
Obesity 29.2% (US avg: 32.4%)

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

Water systems mapped to DuPage County ZIP codes

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

Show all 8 water systems

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

Systems with the most violations in DuPage County

5 water systems with violations in EPA records.

All ZIP Codes in DuPage County

51 ZIP codes tracked in DuPage County.

# ZIP Code City Safety Score Grade Violations Home Value
1 60187 Wheaton 82 B 2 $432K
2 60516 Downers Grove 82 B 2 $423K
3 60523 Oak Brook 82 B 4 $733K
4 60157 Medinah 81 B 4 $513K
5 60540 Naperville 81 B 17 $505K
6 60555 Warrenville 81 B 18 $272K
7 60564 Naperville 81 B 18 $550K
8 60565 Naperville 81 B 17 $490K
9 60126 Elmhurst 80 B 7 $528K
10 60143 Itasca 80 B 4 $387K
11 60517 Woodridge 80 B 18 $342K
12 60106 Bensenville 79 B 6 $266K
13 60181 Villa Park 79 B 7 $295K
14 60191 Wood Dale 79 B 6 $308K
15 60439 Lemont 79 B 44 (1 health) $467K
16 60532 Lisle 79 B 19 $388K
17 60563 Naperville 79 B 21 $423K
18 60188 Carol Stream 78 B 10 $312K
19 60189 Wheaton 78 B 22 $467K
20 60514 Clarendon Hills 78 B 10 (1 health) $568K
21 60108 Bloomingdale 77 B 14 $367K
22 60561 Darien 77 B 10 $389K
23 60172 Roselle 76 B 14 $323K
24 60101 Addison 75 B 9 $315K
25 60559 Westmont 75 B 17 (1 health) $356K
26 60515 Downers Grove 74 B 12 (1 health) $453K
27 60103 Bartlett 73 B 21 (1 health) $353K
28 60139 Glendale Heights 73 B 19 $249K
29 60521 Hinsdale 69 C 25 (1 health) $988K
30 60185 West Chicago 67 C 64 $314K
31 60190 Winfield 67 C 48 $368K
32 60148 Lombard 61 C 7 $329K
33 60137 Glen Ellyn 58 C 17 $491K
34 60105 Bensenville — — —
35 60116 Carol Stream — — —
36 60117 Bloomingdale — — —
37 60128 Carol Stream — — —
38 60132 Carol Stream — — —
39 60138 Glen Ellyn — — —
40 60186 West Chicago — — —
41 60197 Carol Stream — — —
42 60199 Carol Stream — — —
43 60399 Wood Dale — — —
44 60519 Eola — — 0 $247K
45 60522 Hinsdale — — —
46 60566 Naperville — — —
47 60567 Naperville — — —
48 60569 Aurora — — —
49 60598 Aurora — — —
50 60599 Fox Valley — — —
51 60680 Chicago — — —

Recommended Buyer Guides for DuPage 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

DuPage County in Illinois covers 51 tracked ZIP records with an average Home Safety Score of B (76/100) across 33 scored records.

33 of 34 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 5 health-based violations appear in the available health breakdown.

← 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

Is water safe in DuPage County?
DuPage County receives an average Home Safety grade of B from its scored ZIP records (51 ZIP codes tracked); this is a composite index, not a tap-water test.
How many water systems serve DuPage County?
We map 54 public water systems to 51 ZIP codes in our data for DuPage County. EPA may list more systems serving the county, so this is not a full count.
What is the biggest environmental risk in DuPage County?
In ZipCheckup's cost model, the factor with the largest estimated average annual cost in DuPage County is flood. Across all modeled risk factors, the estimated average additional annual cost is $1,961 per homeowner; actual costs vary by home.
How old are homes in DuPage County?
The median home build year in DuPage County is 1973. 55% of homes were built before 1980; homes built before 1978 may contain lead-based paint, and older homes may have older plumbing materials.
How does DuPage County compare to Illinois?
DuPage County has an average Home Safety Score of 76/100 under model 4.0.0, which is at or above the Illinois state average of 68/100.

How to cite this page

APA ZipCheckup. (2026). DuPage County, IL: HSS 76/100; Lead Above EPA Action Level. https://zipcheckup.com/county/illinois/dupage/
BibTeX
@misc{zipcheckup-county-illinois-dupage,
  author = {{ZipCheckup}},
  title  = {{DuPage County, IL: HSS 76/100; Lead Above EPA Action Level}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/illinois/dupage/}
}

Page version: October 2026.

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