2026 Rankings

ZIP Codes with Most EPA Violations in Wisconsin — 2026

Last updated: June 4, 2026

575 ZIP codes ranked by Violations #1: ZIP 54481 (Stevens Point, WI) — 59
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 575 ZIP codes with data in Wisconsin, these are the highest-ranked areas for violations. See also: National ZIP Codes with Most EPA Water Violations | All Wisconsin Rankings

Statistic Value
ZIP codes ranked 575
Highest value 59
Median value 5
State Wisconsin

Top 100 Worst ZIP Codes

Rank ZIP Code City State Violations Safety Score
1 54481 Stevens Point WI 59 46/100
2 54482 Stevens Point WI 59 42/100
3 54492 Stevens Point WI 59 42/100
4 53072 Pewaukee WI 49 40/100
5 53201 Milwaukee WI 41 80/100
6 53202 Milwaukee WI 41 80/100
7 53203 Milwaukee WI 41 80/100
8 53204 Milwaukee WI 41 80/100
9 53205 Milwaukee WI 41 80/100
10 53206 Milwaukee WI 41 80/100
11 53207 Milwaukee WI 41 80/100
12 53208 Milwaukee WI 41 75/100
13 53209 Milwaukee WI 41 65/100
14 53210 Milwaukee WI 41 80/100
15 53211 Milwaukee WI 41 75/100
16 53212 Milwaukee WI 41 80/100
17 53213 Milwaukee WI 41 70/100
18 53214 Milwaukee WI 41 80/100
19 53215 Milwaukee WI 41 75/100
20 53216 Milwaukee WI 41 70/100
21 53217 Milwaukee WI 41 65/100
22 53218 Milwaukee WI 41 65/100
23 53219 Milwaukee WI 41 80/100
24 53220 Milwaukee WI 41 80/100
25 53221 Milwaukee WI 41 75/100
26 53222 Milwaukee WI 41 75/100
27 53223 Milwaukee WI 41 70/100
28 53224 Milwaukee WI 41 75/100
29 53225 Milwaukee WI 41 75/100
30 53226 Milwaukee WI 41 75/100
31 53227 Milwaukee WI 41 75/100
32 53228 Milwaukee WI 41 80/100
33 53233 Milwaukee WI 41 80/100
34 53234 Milwaukee WI 41 80/100
35 53237 Milwaukee WI 41 80/100
36 53244 Milwaukee WI 41 80/100
37 53259 Milwaukee WI 41 80/100
38 53263 Milwaukee WI 41 80/100
39 53267 Milwaukee WI 41 80/100
40 53268 Milwaukee WI 41 80/100
41 53274 Milwaukee WI 41 80/100
42 53278 Milwaukee WI 41 80/100
43 53288 Milwaukee WI 41 80/100
44 53290 Milwaukee WI 41 80/100
45 53293 Milwaukee WI 41 80/100
46 53295 Milwaukee WI 41 80/100
47 54880 Superior WI 40 61/100
48 54632 Genoa WI 35 54/100
49 53167 Rochester WI 31 81/100
50 53140 Kenosha WI 29 69/100
51 53141 Kenosha WI 29 69/100
52 53142 Kenosha WI 29 69/100
53 53143 Kenosha WI 29 69/100
54 53144 Kenosha WI 29 64/100
55 54601 La Crosse WI 25 74/100
56 54602 La Crosse WI 25 78/100
57 54603 La Crosse WI 25 69/100
58 54868 Rice Lake WI 25 82/100
59 53157 Pell Lake WI 24 54/100
60 54822 Cameron WI 24 82/100
61 53186 Waukesha WI 23 41/100
62 53187 Waukesha WI 23 36/100
63 53188 Waukesha WI 23 41/100
64 53189 Waukesha WI 23 46/100
65 53811 Hazel Green WI 23 66/100
66 54526 Glen Flora WI 22 81/100
67 54766 Sheldon WI 22 79/100
68 53168 Salem WI 21 63/100
69 54409 Antigo WI 21 56/100
70 53118 Dousman WI 20 63/100
71 53575 Oregon WI 20 63/100
72 54514 Butternut WI 19 79/100
73 53818 Platteville WI 18 54/100
74 54562 Three Lakes WI 18 59/100
75 53038 Johnson Creek WI 17 69/100
76 53588 Spring Green WI 17 64/100
77 53585 Sharon WI 16 65/100
78 53808 Dickeyville WI 16 68/100
79 53955 Poynette WI 16 61/100
80 53965 Wisconsin Dells WI 16 77/100
81 53182 Union Grove WI 15 81/100
82 54843 Hayward WI 15 82/100
83 53018 Delafield WI 14 67/100
84 53401 Racine WI 14 80/100
85 53402 Racine WI 14 80/100
86 53403 Racine WI 14 80/100
87 53404 Racine WI 14 75/100
88 53405 Racine WI 14 75/100
89 53406 Racine WI 14 80/100
90 53407 Racine WI 14 80/100
91 53408 Racine WI 14 80/100
92 53536 Evansville WI 14 61/100
93 53597 Waunakee WI 14 60/100
94 54121 Florence WI 14 77/100
95 54456 Neillsville WI 14 70/100
96 54759 Pepin WI 14 59/100
97 53170 Silver Lake WI 13 70/100
98 53199 Silver Lake WI 13 73/100
99 53522 Browntown WI 13 65/100
100 54128 Gresham WI 13 69/100

Methodology

Violation counts include all types recorded in the EPA SDWIS database: Maximum Contaminant Level (MCL) violations, treatment technique violations, and monitoring/reporting violations. Both resolved and unresolved violations are counted. Higher counts may reflect longer system histories or larger service areas.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What counts as an EPA water violation?

EPA violations include exceeding Maximum Contaminant Levels (MCLs), failing to treat water properly (treatment technique violations), and not testing or reporting on schedule (monitoring violations). Health-based violations are the most serious.

Does a high violation count mean the water is unsafe now?

Not necessarily. Many violations are historical or monitoring-related. However, a pattern of repeated violations indicates systemic issues with water system management or infrastructure.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

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Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

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