Wisconsin — 1st District
119th Congress · 65 ZIP codes · Avg score 66/100 · Grade C · Updated 2026-07-17
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-17
ZipCheckup tracks water safety for 65 ZIP codes in Wisconsin's 1st District: the district earns a grade C (66/100). 551 EPA violations on record, 83 health-based.
Top Contaminants
ZIP Codes in This District
65 ZIP codes tracked in Wisconsin's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 53129 | Greendale | 83 | B | 1 |
| 2 | 53159 | Powers Lake | 83 | B | 0 |
| 3 | 53177 | Sturtevant | 83 | B | 1 |
| 4 | 53108 | Caledonia | 82 | B | 4 (1 health) |
| 5 | 53171 | Somers | 82 | B | 3 |
| 6 | 53167 | Rochester | 81 | B | 31 (1 health) |
| 7 | 53181 | Twin Lakes | 81 | B | 10 (2 health) |
| 8 | 53182 | Union Grove | 81 | B | 15 (2 health) |
| 9 | 53401 | Racine | 80 | B | 14 (1 health) |
| 10 | 53402 | Racine | 80 | B | 14 (1 health) |
| 11 | 53403 | Racine | 80 | B | 14 (1 health) |
| 12 | 53406 | Racine | 80 | B | 14 (1 health) |
| 13 | 53407 | Racine | 80 | B | 14 (1 health) |
| 14 | 53408 | Racine | 80 | B | 14 (1 health) |
| 15 | 53104 | Bristol | 79 | B | 2 |
| 16 | 53154 | Oak Creek | 77 | B | 4 (1 health) |
| 17 | 53139 | Kansasville | 76 | B | 11 |
| 18 | 53158 | Pleasant Prairie | 76 | B | 7 (2 health) |
| 19 | 53404 | Racine | 75 | B | 14 (1 health) |
| 20 | 53405 | Racine | 75 | B | 14 (1 health) |
| 21 | 53130 | Hales Corners | 74 | B | 12 (1 health) |
| 22 | 53110 | Cudahy | 73 | B | 0 |
| 23 | 53132 | Franklin | 73 | B | 5 |
| 24 | 53185 | Waterford | 73 | B | 8 (2 health) |
| 25 | 53199 | Silver Lake | 73 | B | 13 (2 health) |
| 26 | 53172 | South Milwaukee | 72 | B | 2 |
| 27 | 53179 | Trevor | 72 | B | 3 (1 health) |
| 28 | 53170 | Silver Lake | 70 | B | 13 (2 health) |
| 29 | 53125 | Fontana | 69 | C | 9 (1 health) |
| 30 | 53140 | Kenosha | 69 | C | 29 (7 health) |
| 31 | 53141 | Kenosha | 69 | C | 29 (7 health) |
| 32 | 53142 | Kenosha | 69 | C | 29 (7 health) |
| 33 | 53143 | Kenosha | 69 | C | 29 (7 health) |
| 34 | 53512 | Beloit | 66 | C | 1 |
| 35 | 53525 | Clinton | 66 | C | 7 (1 health) |
| 36 | 53585 | Sharon | 65 | C | 16 (1 health) |
| 37 | 53144 | Kenosha | 64 | C | 29 (7 health) |
| 38 | 53563 | Milton | 64 | C | 4 (1 health) |
| 39 | 53109 | Camp Lake | 63 | C | 0 |
| 40 | 53126 | Franksville | 63 | C | 0 |
| 41 | 53138 | Honey Creek | 63 | C | 0 |
| 42 | 53168 | Salem | 63 | C | 21 (7 health) |
| 43 | 53114 | Darien | 62 | C | 2 |
| 44 | 53191 | Williams Bay | 61 | C | 7 (1 health) |
| 45 | 53128 | Genoa City | 56 | C | 4 |
| 46 | 53147 | Lake Geneva | 56 | C | 2 |
| 47 | 53157 | Pell Lake | 54 | D | 24 (4 health) |
| 48 | 53101 | Bassett | 53 | D | 0 |
| 49 | 53102 | Benet Lake | 53 | D | 0 |
| 50 | 53148 | Lyons | 53 | D | 0 |
Overview
Wisconsin's 1st District encompasses 65 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (66/100).
551 EPA violations have been recorded across this district's water systems. 83 are health-based violations. About 77% 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 - 136 violations
- Stage 2 DBP Rule - 85 violations
- Surface Water Treatment Rule - 69 violations
- Consumer Confidence Report Rule - 66 violations
- Stage 1 DBP Rule - 53 violations
Housing Context
Homes in this district were built on average around 1968 (~58 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
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 65 ZIP codes in Wisconsin's 1st District.