2026 Rankings

ZIP Codes with Most EPA Violations in Missouri — 2026

Last updated: June 4, 2026

630 ZIP codes ranked by Violations #1: ZIP 63736 (Benton, MO) — 64
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 630 ZIP codes with data in Missouri, these are the highest-ranked areas for violations. See also: National ZIP Codes with Most EPA Water Violations | All Missouri Rankings

Statistic Value
ZIP codes ranked 630
Highest value 64
Median value 2
State Missouri

Top 100 Worst ZIP Codes

Rank ZIP Code City State Violations Safety Score
1 63736 Benton MO 64 91/100
2 63740 Chaffee MO 64 74/100
3 63341 Defiance MO 38 53/100
4 65712 Mount Vernon MO 38 78/100
5 65801 Springfield MO 26 73/100
6 65802 Springfield MO 26 70/100
7 65803 Springfield MO 26 75/100
8 65804 Springfield MO 26 70/100
9 65805 Springfield MO 26 75/100
10 65806 Springfield MO 26 70/100
11 65807 Springfield MO 26 70/100
12 65808 Springfield MO 26 73/100
13 65809 Springfield MO 26 70/100
14 65810 Springfield MO 26 70/100
15 65814 Springfield MO 26 73/100
16 65817 Springfield MO 26 73/100
17 65890 Springfield MO 26 73/100
18 65897 Springfield MO 26 73/100
19 65898 Springfield MO 26 73/100
20 65899 Springfield MO 26 73/100
21 63377 Silex MO 23 48/100
22 63824 Blodgett MO 23 86/100
23 63954 Neelyville MO 23 89/100
24 63952 Mill Spring MO 22 69/100
25 64850 Neosho MO 21 72/100
26 63555 Memphis MO 20 69/100
27 63650 Ironton MO 20 48/100
28 63957 Piedmont MO 19 70/100
29 65049 Lake Ozark MO 19 71/100
30 63862 Lilbourn MO 18 79/100
31 65742 Rogersville MO 18 82/100
32 63823 Bertrand MO 17 90/100
33 64073 Mosby MO 17 45/100
34 64624 Braymer MO 17 78/100
35 65771 Walnut Shade MO 17 82/100
36 63456 Monroe City MO 16 58/100
37 63820 Anniston MO 16 88/100
38 63870 Parma MO 16 92/100
39 64752 Hume MO 16 60/100
40 65634 Cross Timbers MO 16 81/100
41 63016 Cedar Hill MO 15 63/100
42 63084 Union MO 15 71/100
43 63775 Perryville MO 15 54/100
44 63846 Essex MO 15 92/100
45 64856 Pineville MO 15 66/100
46 63767 Morley MO 14 89/100
47 63771 Oran MO 14 93/100
48 63877 Steele MO 14 87/100
49 64469 Maysville MO 14 72/100
50 64661 Mercer MO 14 69/100
51 64725 Archie MO 14 61/100
52 64836 Carthage MO 14 77/100
53 65066 Owensville MO 14 82/100
54 63640 Farmington MO 13 68/100
55 64720 Adrian MO 13 80/100
56 65611 Blue Eye MO 13 74/100
57 65706 Marshfield MO 13 70/100
58 63352 Laddonia MO 12 81/100
59 63784 Vanduser MO 12 85/100
60 64098 Weston MO 12 64/100
61 64461 Hopkins MO 12 65/100
62 64463 King City MO 12 61/100
63 65656 Galena MO 12 71/100
64 65724 Pittsburg MO 12 70/100
65 63534 Callao MO 11 75/100
66 63851 Hayti MO 11 82/100
67 63867 Matthews MO 11 82/100
68 64723 Amsterdam MO 11 66/100
69 64842 Fairview MO 11 75/100
70 65079 Sunrise Beach MO 11 71/100
71 63353 Louisiana MO 10 56/100
72 63390 Wright City MO 10 72/100
73 63638 Ellington MO 10 72/100
74 63732 Altenburg MO 10 77/100
75 63837 Clarkton MO 10 93/100
76 63876 Senath MO 10 93/100
77 64020 Concordia MO 10 78/100
78 64479 Ravenwood MO 10 65/100
79 64483 Rosendale MO 10 63/100
80 65026 Eldon MO 10 77/100
81 65051 Linn MO 10 70/100
82 65084 Versailles MO 10 79/100
83 65351 Sweet Springs MO 10 75/100
84 65571 Summersville MO 10 77/100
85 65652 Fordland MO 10 75/100
86 65653 Forsyth MO 10 76/100
87 65713 Niangua MO 10 82/100
88 63620 Annapolis MO 9 61/100
89 63654 Lesterville MO 9 64/100
90 63874 Risco MO 9 94/100
91 64468 Maryville MO 9 64/100
92 65013 Belle MO 9 72/100
93 65041 Hermann MO 9 57/100
94 65043 Holts Summit MO 9 77/100
95 65320 Arrow Rock MO 9 77/100
96 65681 Lampe MO 9 76/100
97 63005 Chesterfield MO 8 51/100
98 63006 Chesterfield MO 8 66/100
99 63013 Beaufort MO 8 81/100
100 63017 Chesterfield MO 8 56/100

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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