2026 Rankings

ZIP Codes with Most EPA Violations in North Dakota —...

Last updated: June 4, 2026

119 ZIP codes ranked by Violations #1: ZIP 58357 (Oberon, ND) — 24
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 119 ZIP codes with data in North Dakota, these are the highest-ranked areas for violations. See also: National ZIP Codes with Most EPA Water Violations | All North Dakota Rankings

Statistic Value
ZIP codes ranked 119
Highest value 24
Median value 2
State North Dakota

Top 100 Worst ZIP Codes

Rank ZIP Code City State Violations Safety Score
1 58357 Oberon ND 24 63/100
2 58422 Cathay ND 20 47/100
3 58439 Forbes ND 17 61/100
4 58573 Strasburg ND 12 61/100
5 58760 Maxbass ND 12 11/100
6 58854 Watford City ND 12 64/100
7 58737 Flaxton ND 11 67/100
8 58776 Ross ND 11 59/100
9 58520 Almont ND 10 44/100
10 58559 Mercer ND 10 58/100
11 58650 Regent ND 8 56/100
12 58060 Milnor ND 7 58/100
13 58228 Emerado ND 6 53/100
14 58433 Edgeley ND 5 83/100
15 58444 Goodrich ND 5 64/100
16 58486 Sykeston ND 5 62/100
17 58531 Coleharbor ND 5 65/100
18 58788 Towner ND 5 69/100
19 58844 Fortuna ND 5 65/100
20 58001 Abercrombie ND 4 65/100
21 58004 Amenia ND 4 68/100
22 58038 Grandin ND 4 63/100
23 58329 Dunseith ND 4 61/100
24 58344 Lakota ND 4 65/100
25 58380 Tolna ND 4 63/100
26 58454 Jud ND 4 65/100
27 58632 Golva ND 4 53/100
28 58656 Taylor ND 4 60/100
29 58741 Granville ND 4 61/100
30 58021 Davenport ND 3 64/100
31 58032 Forman ND 3 52/100
32 58036 Gardner ND 3 64/100
33 58045 Hillsboro ND 3 56/100
34 58047 Horace ND 3 52/100
35 58048 Hunter ND 3 67/100
36 58072 Valley City ND 3 52/100
37 58249 Langdon ND 3 69/100
38 58262 Mountain ND 3 69/100
39 58267 Northwood ND 3 67/100
40 58317 Bisbee ND 3 65/100
41 58356 New Rockford ND 3 62/100
42 58374 Sheyenne ND 3 64/100
43 58530 Center ND 3 67/100
44 58544 Hazelton ND 3 69/100
45 58626 Dunn Center ND 3 60/100
46 58642 Manning ND 3 41/100
47 58718 Berthold ND 3 67/100
48 58744 Karlsruhe ND 3 67/100
49 58746 Kenmare ND 3 69/100
50 58011 Buffalo ND 2 62/100
51 58030 Fairmount ND 2 66/100
52 58053 Lidgerwood ND 2 65/100
53 58240 Hatton ND 2 64/100
54 58271 Pembina ND 2 54/100
55 58278 Thompson ND 2 61/100
56 58355 Nekoma ND 2 65/100
57 58368 Rugby ND 2 69/100
58 58416 Binford ND 2 65/100
59 58418 Bowdon ND 2 53/100
60 58429 Dazey ND 2 69/100
61 58441 Fullerton ND 2 64/100
62 58448 Hannaford ND 2 65/100
63 58455 Kensal ND 2 54/100
64 58458 Lamoure ND 2 85/100
65 58478 Robinson ND 2 61/100
66 58494 Wing ND 2 65/100
67 58529 Carson ND 2 69/100
68 58581 Zeeland ND 2 65/100
69 58630 Gladstone ND 2 54/100
70 58645 Medora ND 2 61/100
71 58701 Minot ND 2 33/100
72 58702 Minot ND 2 48/100
73 58703 Minot ND 2 33/100
74 58707 Minot ND 2 48/100
75 58740 Glenburn ND 2 65/100
76 58756 Makoti ND 2 55/100
77 58765 Noonan ND 2 47/100
78 58785 Surrey ND 2 51/100
79 58790 Velva ND 2 47/100
80 58793 Westhope ND 2 69/100
81 58801 Williston ND 2 61/100
82 58802 Williston ND 2 66/100
83 58803 Williston ND 2 62/100
84 58853 Trenton ND 2 64/100
85 58015 Christine ND 1 65/100
86 58042 Harwood ND 1 51/100
87 58054 Lisbon ND 1 40/100
88 58068 Sheldon ND 1 62/100
89 58077 Walcott ND 1 70/100
90 58220 Cavalier ND 1 65/100
91 58225 Drayton ND 1 53/100
92 58231 Fordville ND 1 66/100
93 58251 Larimore ND 1 70/100
94 58351 Minnewaukan ND 1 53/100
95 58367 Rolla ND 1 66/100
96 58413 Ashley ND 1 70/100
97 58421 Carrington ND 1 48/100
98 58436 Ellendale ND 1 66/100
99 58463 Mcclusky ND 1 64/100
100 58474 Oakes ND 1 68/100

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 →

Related Rankings

Home Safety 2026 Combined water, lead, radon and environmental risk PFAS 2026 Forever chemicals detected in drinking water Lead Risk 2026 Lead pipe infrastructure and EPA exceedances
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.

Get safety alerts for North Dakota

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Check your water filter options Free tool — no phone call required.