STATE REPORT IL HEALTH VIOLATIONS: 222

Illinois Home Safety Profiles by ZIP

1583 ZIP codes · 776 water systems · State-specific plumbing code

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData, NWS, State plumbing boards, Rewiring America

ZipCheckup tracks drinking-water and home-safety data for 1,583 ZIP codes across Illinois, covering 776 public water systems that serve about 10,630,281 people. 826 ZIP codes are mapped to at least one water system with an EPA violation on record.

1583
ZIP Codes
776
Water Systems
826
ZIPs with Violations
State-specific
Plumbing Code
C · 68
Avg Safety Score
10
ZIPs Mapped to a System Above the Lead Action Level
51%
EPA Radon Zone 1 (county-level potential)
#34
of 50 States
47%
ZIPs Rated A or B
89%
ZIPs with Violations
C
Illinois average: 68/100 - ranked #34 of 50 states. 5 points below the national average (73). Water systems mapped to 89% of ZIP codes have recorded violations.

Measured by ZipCheckup's composite scoring, Illinois comes out at C or below.

Score Distribution

How Illinois's 1583 ZIP codes are distributed across safety grades.

0
A
213
B
199
C
40
D
1
F
85-10070-8455-6940-540-39

Home Safety Scores by State

Loading map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

Model 4.0.0 inputs: EPA SDWIS, UCMR5 PFAS, EPA radon zones, annual county AQI •

Top 10 ZIP Codes by Home Safety Score in Illinois

Highest Home Safety Scores in the state.

#ZIP CodeCityCountyScoreGrade
1 60033 HarvardMcHenry 83 B
2 60152 MarengoMcHenry 83 B
3 62014 Bunker HillMacoupin 83 B
4 62059 LovejoySt. Clair 83 B
5 62061 MarineMadison 83 B
6 62090 VeniceMadison 83 B
7 62205 East Saint LouisSt. Clair 83 B
8 62206 East Saint LouisSt. Clair 83 B
9 62207 East Saint LouisSt. Clair 83 B
10 62217 BaldwinRandolph 83 B

10 Lowest-Scoring ZIP Codes in Illinois

#ZIP CodeCityCountyScoreGradeViolations
1 61523 ChillicothePeoria 39 F 29
2 60177 South ElginKane 40 D 18
3 60426 HarveyCook 42 D 68
4 60406 Blue IslandCook 42 D 57
5 60430 HomewoodCook 43 D 27
6 61604 PeoriaPeoria 44 D 10
7 61607 PeoriaPeoria 45 D 7
8 61547 MapletonPeoria 45 D 7
9 61536 Hanna CityPeoria 45 D 6
10 60119 ElburnKane 46 D 9

County Rankings

Water quality breakdown by county. 102 counties with data in Illinois.

Loading county map…
F (0-39) D (40-54) C (55-69) B (70-84) A (85+)

County-level aggregation of measured ZIP Home Safety Scores • EPA SDWIS, UCMR 5 PFAS, EPA radon zones, EPA AirData

CountyAvg ScoreGradeZIPsBest ZIPWorst ZIP
17001 65 C 17 62320 (66) 62305 (64)
17003 N/A N/A 7 N/A N/A
17005 N/A N/A 5 N/A N/A
17007 N/A N/A 5 N/A N/A
17009 N/A N/A 2 N/A N/A
17011 N/A N/A 24 N/A N/A
17013 N/A N/A 7 N/A N/A
17015 N/A N/A 7 N/A N/A
17017 N/A N/A 6 N/A N/A
17019 64 C 32 61821 (67) 61802 (61)
17021 N/A N/A 13 N/A N/A
17023 75 B 7 62441 (81) 62420 (69)
17025 N/A N/A 7 N/A N/A
17027 N/A N/A 13 N/A N/A
17029 N/A N/A 6 N/A N/A
17031 68 C 218 60022 (75) 60426 (42)
17033 N/A N/A 7 N/A N/A
17035 N/A N/A 6 N/A N/A
17037 N/A N/A 12 N/A N/A
17039 N/A N/A 9 N/A N/A
17041 N/A N/A 7 N/A N/A
17043 76 B 51 60187 (82) 60137 (58)
17045 N/A N/A 8 N/A N/A
17047 N/A N/A 6 N/A N/A
17049 74 B 8 62401 (74) 62443 (72)
17051 N/A N/A 10 N/A N/A
17053 N/A N/A 9 N/A N/A
17055 N/A N/A 16 N/A N/A
17057 N/A N/A 20 N/A N/A
17059 N/A N/A 6 N/A N/A
17061 N/A N/A 10 N/A N/A
17063 N/A N/A 10 N/A N/A
17065 79 B 6 62817 (83) 62859 (71)
17067 N/A N/A 17 N/A N/A
17069 N/A N/A 4 N/A N/A
17071 N/A N/A 9 N/A N/A
17073 N/A N/A 15 N/A N/A
17075 N/A N/A 23 N/A N/A
17077 N/A N/A 16 N/A N/A
17079 N/A N/A 8 N/A N/A
17081 N/A N/A 13 N/A N/A
17083 65 C 11 62022 (66) 60203 (63)
17085 65 C 10 61041 (66) 61036 (63)
17087 N/A N/A 11 N/A N/A
17089 59 C 33 60110 (66) 60177 (40)
17091 N/A N/A 18 N/A N/A
17093 N/A N/A 7 N/A N/A
17095 N/A N/A 17 N/A N/A
17097 71 B 33 60040 (81) 60041 (50)
17099 N/A N/A 24 N/A N/A
17101 N/A N/A 4 N/A N/A
17103 N/A N/A 15 N/A N/A
17105 N/A N/A 19 N/A N/A
17107 N/A N/A 14 N/A N/A
17109 N/A N/A 10 N/A N/A
17111 73 B 20 60033 (83) 60050 (53)
17113 59 C 30 61748 (67) 61705 (50)
17115 64 C 19 62501 (66) 62549 (60)
17117 76 B 20 62014 (83) 62088 (67)
17119 73 B 28 62061 (83) 62234 (50)
17121 N/A N/A 10 N/A N/A
17123 N/A N/A 7 N/A N/A
17125 N/A N/A 8 N/A N/A
17127 N/A N/A 3 N/A N/A
17129 N/A N/A 6 N/A N/A
17131 N/A N/A 11 N/A N/A
17133 N/A N/A 7 N/A N/A
17135 N/A N/A 16 N/A N/A
17137 N/A N/A 11 N/A N/A
17139 N/A N/A 4 N/A N/A
17141 N/A N/A 17 N/A N/A
17143 48 D 41 61525 (50) 61523 (39)
17145 N/A N/A 5 N/A N/A
17147 N/A N/A 11 N/A N/A
17149 N/A N/A 15 N/A N/A
17151 N/A N/A 3 N/A N/A
17153 N/A N/A 9 N/A N/A
17155 N/A N/A 8 N/A N/A
17157 77 B 15 62217 (83) 62272 (67)
17159 N/A N/A 6 N/A N/A
17161 56 C 21 61232 (67) 61282 (50)
17163 76 B 32 62059 (83) 62258 (60)
17165 N/A N/A 7 N/A N/A
17167 63 C 57 62536 (67) 62712 (50)
17169 N/A N/A 6 N/A N/A
17171 N/A N/A 4 N/A N/A
17173 N/A N/A 13 N/A N/A
17175 N/A N/A 6 N/A N/A
17177 N/A N/A 14 N/A N/A
17179 N/A N/A 20 N/A N/A
17181 N/A N/A 7 N/A N/A
17183 N/A N/A 24 N/A N/A
17185 N/A N/A 5 N/A N/A
17187 N/A N/A 8 N/A N/A
17189 N/A N/A 10 N/A N/A
17191 N/A N/A 11 N/A N/A
17193 N/A N/A 8 N/A N/A
17195 N/A N/A 12 N/A N/A
17197 75 B 28 60408 (82) 60403 (55)
17199 N/A N/A 10 N/A N/A
17201 58 C 28 61101 (66) 61073 (47)
17203 N/A N/A 13 N/A N/A

Most Common Contaminants in Illinois

Contaminant / RuleCategoryZIPs AffectedViolationsHealth Risk
Surface Water Treatment Rule Treatment Technique 604 1582 No
Haloacetic Acids (HAA5) Disinfection Byproducts 461 942 Yes
Stage 1 DBP Rule Treatment Technique 444 976 Yes
Total Trihalomethanes (TTHM) Disinfection Byproducts 390 812 Yes
Lead and Copper Rule Treatment Technique 369 1121 No
Stage 2 DBP Rule Treatment Technique 345 621 Yes
Consumer Confidence Report Rule Reporting 246 451 Yes
Revised Total Coliform Rule Microbiological 177 312 No

Overview

We track multi-source home safety signals for 1583 ZIP records across Illinois. Home Safety Score model 4.0.0 is published for 453 scored records; missing required evidence suppresses the score.

The EPA snapshots used for this build directly map water systems to 923 ZIP records, covering 776 community water systems that serve approximately 10,630,281 people.

826 of 923 ZIP codes with a reported violation count in the available EPA record (89%) have recorded EPA violations. 222 health-based violations appear in the available health breakdown.

Plumbing Regulations

Illinois follows the Illinois Plumbing Code (2014 edition).

  • Plumbing code: State-specific (2014)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full Illinois regulations →

Areas with Most Violations

ZIP Code City Home Safety Grade Violations Health-Based System
60411 Chicago Heights C 144 0 Chicago Heights
60050 Mchenry D 124 1 Mchenry
60051 Mchenry C 118 1 Prairie Path Water Company-whispering Hills
60020 Fox Lake D 114 2 Fox Lake
62056 Litchfield — 91 9 Litchfield
60072 Ringwood — 90 1 Mchenry
61244 East Moline D 84 7 East Moline
60073 Round Lake C 83 2 Round Lake Beach
60441 Lockport C 81 2 Lockport
62712 Springfield D 80 4 Springfield

Areas with No Violations

ZIP Code City Home Safety Grade System Population
60022 Glencoe B Glencoe 8,849
60033 Harvard B Harvard 9,469
60201 Evanston B Evanston 74,486
60202 Evanston B Evanston 74,486
60208 Evanston — Evanston 74,486
60457 Hickory Hills B Hickory Hills 14,505
60458 Justice B Justice-willow Springs Water Commission 18,450
60460 Odell — Il American-streator 19,000
60470 Ransom B Il American-streator 19,000
60474 South Wilmington — Gardner 1,361

Home Safety Score

Average Home Safety Score for Illinois: C (68/100) across 453 scored of 1583 tracked ZIP records.

Model 4.0.0 uses the canonical components water-compliance, pfas-mcl-screen, radon-zone, annual-aqi across 3 required domains. The sections below provide additional context and do not change that score. Missing required evidence suppresses the score, and a favorable result is not a property-level safety certification.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0047 mg/L (EPA action level: 0.015 mg/L)
  • 10 of 923 ZIP codes with known status exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 797 ZIP codes (51%)
  • Moderate risk (Zone 2): 742 ZIP codes
  • Low risk (Zone 3): 20 ZIP codes

ZIP Code Reports for Illinois

Largest Communities

ZIP Code City Population Safety Grade Violations
60068 Park Ridge 2,882,078 C 31
60804 Cicero 2,868,460 C 30
60644 Chicago 2,804,308 C 18
60827 Riverdale 2,784,993 C 51
60656 Chicago 2,776,949 B 20
60633 Chicago 2,762,297 C 31
60631 Chicago 2,761,698 B 20
60707 Elmwood Park 2,756,590 B 13
60646 Chicago 2,750,658 B 11
60638 Chicago 2,748,479 C 25
60655 Chicago 2,742,340 C 16
60620 Chicago 2,741,251 B 10
60634 Chicago 2,733,017 B 11
60629 Chicago 2,723,708 C 14
60652 Chicago 2,723,708 C 14
60601 Chicago 2,721,308 B 10
60602 Chicago 2,721,308 B 10
60603 Chicago 2,721,308 B 10
60604 Chicago 2,721,308 B 10
60605 Chicago 2,721,308 B 10

Lowest Published Home Safety Scores

ZIP Code City Score Grade Violations
61523 Chillicothe 39 F 29
60177 South Elgin 40 D 18
60406 Blue Island 42 D 57
60426 Harvey 42 D 68
60430 Homewood 43 D 27

Highest Published Home Safety Scores

ZIP Code City Score Grade Violations
60033 Harvard 83 B 0
60152 Marengo 83 B 2
62014 Bunker Hill 83 B 2
62059 Lovejoy 83 B 0
62061 Marine 83 B 1

All 1583 ZIP Codes in Illinois

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Largest water systems in Illinois

The 12 largest community water systems in Illinois, out of 776 in our data.

Show all 12 water systems

Systems with the most violations in Illinois

12 systems in Illinois with the most recorded EPA violations.

Frequently Asked Questions

Is the water safe to drink in Illinois?

Illinois has 776 community water systems serving 10,630,281 people across 1583 ZIP codes. There are 3,327 recorded violations among these water systems, including 222 health-based. 826 of 1583 ZIP codes are mapped to at least one water system with a recorded violation.

What plumbing code does Illinois follow?

Illinois's listed plumbing code type is State-specific as of our last review; local jurisdictions may adopt or amend codes. Plumbing work may require a licensed plumber; check state exemptions and local requirements.

Is lead a concern in Illinois's drinking water?

10 ZIP codes in Illinois are mapped to water systems whose reported 90th-percentile lead result exceeded the EPA action level of 0.015 mg/L.

What is the radon risk in Illinois?

51% of ZIP codes in Illinois are mapped to counties classified as EPA Radon Zone 1 (highest county-level radon potential).

How to cite this page

APA ZipCheckup. (2026). Illinois Home Safety Profiles by ZIP. https://zipcheckup.com/states/illinois/
BibTeX 
@misc{zipcheckup-states-illinois,
  author = {{ZipCheckup}},
  title  = {{Illinois Home Safety Profiles by ZIP}},
  year   = {2026},
  url    = {https://zipcheckup.com/states/illinois/}
}

Page version: October 2026.

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