Illinois — 11th District
119th Congress · 27 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
27 ZIP codes tracked in Illinois's 11th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 60097 | Wonder Lake | 82 | B | 9 (1 health) |
| 2 | 60142 | Huntley | 79 | B | 1 (1 health) |
| 3 | 60033 | Harvard | 78 | B | 0 |
| 4 | 60152 | Marengo | 78 | B | 0 |
| 5 | 60098 | Woodstock | 77 | B | 3 (1 health) |
| 6 | 60156 | Lake In The Hills | 76 | B | 1 |
| 7 | 60102 | Algonquin | 73 | B | 0 |
| 8 | 60180 | Union | 72 | B | 2 |
| 9 | 60013 | Cary | 71 | B | 1 |
| 10 | 60034 | Hebron | 70 | B | 2 |
| 11 | 62438 | Lakewood | 65 | C | 109 |
| 12 | 60072 | Ringwood | 63 | C | 0 |
| 13 | 61008 | Belvidere | 63 | C | 2 |
| 14 | 60071 | Richmond | 58 | C | 0 |
| 15 | 61065 | Poplar Grove | 56 | C | 14 |
| 16 | 60001 | Alden | 53 | D | 0 |
| 17 | 60901 | Kankakee | 51 | D | 14 (4 health) |
| 18 | 60081 | Spring Grove | 50 | D | 0 |
| 19 | 61012 | Capron | 48 | D | 21 |
| 20 | 60910 | Aroma Park | 45 | D | 0 |
| 21 | 60914 | Bourbonnais | 45 | D | 0 |
| 22 | 60915 | Bradley | 45 | D | 0 |
| 23 | 61038 | Garden Prairie | 45 | D | 0 |
| 24 | 60012 | Crystal Lake | 42 | D | 23 |
| 25 | 60014 | Crystal Lake | 42 | D | 23 |
| 26 | 60039 | Crystal Lake | 42 | D | 23 |
| 27 | 61011 | Caledonia | 40 | D | 0 |
Overview
Illinois's 11th District serving an estimated 820,422 residents encompasses 27 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (60/100).
248 EPA violations have been recorded across this district's water systems. 7 are health-based violations. About 56% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Contaminant 4109 — 14 violations
- Surface Water Treatment Rule — 12 violations
- PFOA — 8 violations
- PFNA — 8 violations
- Monochloroacetic Acid — 8 violations
Housing Context
Homes in this district were built on average around 1983 (~43 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 27 ZIP codes in Illinois's 11th District.