CONGRESSIONAL DISTRICT WI

Wisconsin — 1st District

119th Congress · 69 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-03

Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03

C
District Grade
67
Avg Safety Score
69
ZIP Codes
1173
Total Violations
102
Health Violations
87
Water Systems
Greendale
Best ZIP: 53129 (83/100)
Avalon
Lowest ZIP: 53505 (40/100)

Top Contaminants

Lead and Copper Rule (193) Stage 2 DBP Rule (101) Consumer Confidence Report Rule (95) Haloacetic Acids (HAA5) (84) Total Trihalomethanes (TTHM) (83)

ZIP Codes in This District

69 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 53008 Brookfield 82 B 22 (1 health)
5 53108 Caledonia 82 B 6 (1 health)
6 53171 Somers 82 B 3
7 54649 Oakdale 82 B 2 (1 health)
8 53167 Rochester 81 B 31 (1 health)
9 53181 Twin Lakes 81 B 12 (2 health)
10 53182 Union Grove 81 B 14 (2 health)
11 53401 Racine 80 B 36 (1 health)
12 53402 Racine 80 B 36 (1 health)
13 53403 Racine 80 B 36 (1 health)
14 53406 Racine 80 B 36 (1 health)
15 53407 Racine 80 B 36 (1 health)
16 53408 Racine 80 B 36 (1 health)
17 53104 Bristol 79 B 2
18 53005 Brookfield 77 B 22 (1 health)
19 53045 Brookfield 77 B 22 (1 health)
20 53154 Oak Creek 77 B 4 (1 health)
21 53185 Waterford 77 B 6 (1 health)
22 53139 Kansasville 76 B 11
23 53158 Pleasant Prairie 76 B 7 (2 health)
24 53404 Racine 75 B 36 (1 health)
25 53405 Racine 75 B 36 (1 health)
26 53130 Hales Corners 74 B 12 (1 health)
27 53110 Cudahy 73 B 0
28 53132 Franklin 73 B 5
29 53199 Silver Lake 73 B 20 (2 health)
30 53172 South Milwaukee 72 B 2
31 53179 Trevor 72 B 3 (1 health)
32 53170 Silver Lake 70 B 20 (2 health)
33 53120 East Troy 69 C 6 (1 health)
34 53125 Fontana 69 C 9 (1 health)
35 53128 Genoa City 69 C 4
36 53140 Kenosha 67 C 80 (9 health)
37 53141 Kenosha 67 C 80 (9 health)
38 53142 Kenosha 67 C 80 (9 health)
39 53143 Kenosha 67 C 80 (9 health)
40 53114 Darien 66 C 0
41 53119 Eagle 66 C 0
42 53109 Camp Lake 63 C 0
43 53126 Franksville 63 C 0
44 53138 Honey Creek 63 C 0
45 53144 Kenosha 62 C 80 (9 health)
46 53585 Sharon 62 C 82 (3 health)
47 53168 Salem 61 C 27 (9 health)
48 53191 Williams Bay 61 C 7 (1 health)
49 54903 Oshkosh 60 C 16 (2 health)
50 53147 Lake Geneva 56 C 2

Overview

Wisconsin's 1st District serving an estimated 2,313,126 residents encompasses 69 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (67/100).

1173 EPA violations have been recorded across this district's water systems. 102 are health-based violations. About 75% 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 — 193 violations
  • Stage 2 DBP Rule — 101 violations
  • Consumer Confidence Report Rule — 95 violations
  • Haloacetic Acids (HAA5) — 84 violations
  • Total Trihalomethanes (TTHM) — 83 violations

Housing Context

Homes in this district were built on average around 1970 (~56 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.

Data Sources

Updated daily. Data covers 69 ZIP codes in Wisconsin's 1st District.

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