Illinois — 11th District
119th Congress · 42 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 42 ZIP codes in Illinois's 11th District: the district earns a grade C (56/100). 123 EPA violations on record, 6 health-based.
Top Contaminants
ZIP Codes in This District
42 ZIP codes tracked in Illinois's 11th District.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 60490 | Bolingbrook | 83 | B | 0 |
| 2 | 60142 | Huntley | 79 | B | 1 (1 health) |
| 3 | 60152 | Marengo | 78 | B | 0 |
| 4 | 60098 | Woodstock | 77 | B | 3 (1 health) |
| 5 | 60517 | Woodridge | 76 | B | 1 |
| 6 | 60567 | Naperville | 75 | B | 1 |
| 7 | 60440 | Bolingbrook | 73 | B | 0 |
| 8 | 60180 | Union | 72 | B | 2 |
| 9 | 60563 | Naperville | 72 | B | 1 |
| 10 | 60119 | Elburn | 68 | C | 1 |
| 11 | 60540 | Naperville | 67 | C | 1 |
| 12 | 60565 | Naperville | 67 | C | 1 |
| 13 | 60050 | Mchenry | 66 | C | 7 (1 health) |
| 14 | 60539 | Mooseheart | 66 | C | 0 |
| 15 | 60145 | Kingston | 65 | C | 9 (2 health) |
| 16 | 60183 | Wasco | 65 | C | 2 |
| 17 | 60109 | Burlington | 64 | C | 1 |
| 18 | 61008 | Belvidere | 63 | C | 2 |
| 19 | 60510 | Batavia | 62 | C | 3 |
| 20 | 60175 | Saint Charles | 59 | C | 1 |
| 21 | 60012 | Crystal Lake | 58 | C | 2 |
| 22 | 60039 | Crystal Lake | 58 | C | 2 |
| 23 | 60140 | Hampshire | 58 | C | 8 |
| 24 | 60151 | Maple Park | 58 | C | 7 (1 health) |
| 25 | 60135 | Genoa | 56 | C | 1 |
| 26 | 60001 | Alden | 53 | D | 0 |
| 27 | 60439 | Lemont | 49 | D | 3 |
| 28 | 60134 | Geneva | 48 | D | 6 |
| 29 | 60084 | Wauconda | 46 | D | 1 |
| 30 | 60569 | Aurora | 45 | D | 7 |
| 31 | 61038 | Garden Prairie | 45 | D | 0 |
| 32 | 60144 | Kaneville | 40 | D | 0 |
| 33 | 60147 | Lafox | 40 | D | 0 |
| 34 | 60504 | Aurora | 40 | D | 7 |
| 35 | 60507 | Aurora | 40 | D | 7 |
| 36 | 60519 | Eola | 40 | D | 0 |
| 37 | 60542 | North Aurora | 40 | D | 0 |
| 38 | 60502 | Aurora | 35 | F | 7 |
| 39 | 60506 | Aurora | 30 | F | 7 |
| 40 | 60568 | Aurora | 28 | F | 7 |
| 41 | 60572 | Aurora | 28 | F | 7 |
| 42 | 60505 | Aurora | 25 | F | 7 |
Overview
Illinois's 11th District encompasses 42 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (56/100).
123 EPA violations have been recorded across this district's water systems. 6 are health-based violations. About 76% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Surface Water Treatment Rule - 30 violations
- Stage 1 DBP Rule - 22 violations
- Atrazine - 16 violations
- Revised Total Coliform Rule - 10 violations
- Contaminant 4109 - 8 violations
Housing Context
Homes in this district were built on average around 1982 (~44 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 10 ZIP codes 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 42 ZIP codes in Illinois's 11th District.