Wisconsin — 5th District
119th Congress · 71 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 71 ZIP codes in Wisconsin's 5th District: the district earns a grade C (58/100). 488 EPA violations on record, 133 health-based.
Top Contaminants
ZIP Codes in This District
71 ZIP codes tracked in Wisconsin's 5th District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 53220 | Milwaukee | 80 | B | 41 (2 health) |
| 2 | 53228 | Milwaukee | 80 | B | 41 (2 health) |
| 3 | 53227 | Milwaukee | 75 | B | 41 (2 health) |
| 4 | 53002 | Allenton | 70 | B | 0 |
| 5 | 53017 | Colgate | 70 | B | 0 |
| 6 | 53058 | Nashotah | 70 | B | 0 |
| 7 | 53156 | Palmyra | 70 | B | 1 |
| 8 | 53178 | Sullivan | 70 | B | 0 |
| 9 | 53594 | Waterloo | 70 | B | 1 |
| 10 | 53022 | Germantown | 69 | C | 5 (1 health) |
| 11 | 53037 | Jackson | 69 | C | 3 (1 health) |
| 12 | 53038 | Johnson Creek | 69 | C | 17 (1 health) |
| 13 | 53040 | Kewaskum | 69 | C | 0 |
| 14 | 53064 | North Lake | 69 | C | 3 (1 health) |
| 15 | 53086 | Slinger | 69 | C | 2 (1 health) |
| 16 | 53120 | East Troy | 69 | C | 6 (1 health) |
| 17 | 53149 | Mukwonago | 69 | C | 10 (1 health) |
| 18 | 53036 | Ixonia | 68 | C | 4 |
| 19 | 53146 | New Berlin | 68 | C | 1 |
| 20 | 53183 | Wales | 68 | C | 5 (2 health) |
| 21 | 53579 | Reeseville | 68 | C | 5 (2 health) |
| 22 | 53007 | Butler | 67 | C | 3 |
| 23 | 53018 | Delafield | 67 | C | 14 (3 health) |
| 24 | 53034 | Hustisford | 66 | C | 0 |
| 25 | 53035 | Iron Ridge | 66 | C | 0 |
| 26 | 53069 | Okauchee | 66 | C | 0 |
| 27 | 53076 | Richfield | 66 | C | 0 |
| 28 | 53089 | Sussex | 66 | C | 6 (1 health) |
| 29 | 53119 | Eagle | 66 | C | 0 |
| 30 | 53557 | Lowell | 66 | C | 1 |
| 31 | 53008 | Brookfield | 65 | C | 7 (1 health) |
| 32 | 53027 | Hartford | 65 | C | 0 |
| 33 | 53032 | Horicon | 65 | C | 3 (1 health) |
| 34 | 53091 | Theresa | 65 | C | 3 (2 health) |
| 35 | 53005 | Brookfield | 64 | C | 7 (1 health) |
| 36 | 53016 | Clyman | 64 | C | 3 (2 health) |
| 37 | 53045 | Brookfield | 64 | C | 7 (1 health) |
| 38 | 53046 | Lannon | 64 | C | 2 |
| 39 | 53052 | Menomonee Falls | 64 | C | 1 |
| 40 | 53150 | Muskego | 64 | C | 9 (1 health) |
| 41 | 53118 | Dousman | 63 | C | 20 (7 health) |
| 42 | 53153 | North Prairie | 62 | C | 5 |
| 43 | 53122 | Elm Grove | 59 | C | 6 (1 health) |
| 44 | 53051 | Menomonee Falls | 58 | C | 1 |
| 45 | 53151 | New Berlin | 58 | C | 1 |
| 46 | 53551 | Lake Mills | 58 | C | 3 (1 health) |
| 47 | 53033 | Hubertus | 55 | C | 0 |
| 48 | 53066 | Oconomowoc | 54 | D | 6 |
| 49 | 53003 | Ashippun | 53 | D | 0 |
| 50 | 53060 | Newburg | 53 | D | 0 |
Overview
Wisconsin's 5th District encompasses 71 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (58/100).
488 EPA violations have been recorded across this district's water systems. 133 are health-based violations. About 69% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Lead and Copper Rule - 93 violations
- Consumer Confidence Report Rule - 70 violations
- Gross Alpha - 59 violations
- Stage 1 DBP Rule - 59 violations
- Stage 2 DBP Rule - 53 violations
Housing Context
Homes in this district were built on average around 1977 (~49 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 71 ZIP codes in Wisconsin's 5th District.