North Dakota — At-Large
119th Congress · 407 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 407 ZIP codes in North Dakota's At-Large: the district earns a grade C (56/100). 395 EPA violations on record, 30 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in North Dakota's At-Large. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 58415 | Berlin | 88 | A | 0 |
| 2 | 58456 | Kulm | 88 | A | 0 |
| 3 | 58490 | Verona | 86 | A | 1 |
| 4 | 58458 | Lamoure | 85 | A | 2 |
| 5 | 58433 | Edgeley | 83 | B | 5 |
| 6 | 58018 | Colfax | 70 | B | 0 |
| 7 | 58027 | Enderlin | 70 | B | 0 |
| 8 | 58041 | Hankinson | 70 | B | 0 |
| 9 | 58061 | Mooreton | 70 | B | 0 |
| 10 | 58077 | Walcott | 70 | B | 1 |
| 11 | 58105 | Fargo | 70 | B | 0 |
| 12 | 58108 | Fargo | 70 | B | 0 |
| 13 | 58109 | Fargo | 70 | B | 0 |
| 14 | 58121 | Fargo | 70 | B | 0 |
| 15 | 58124 | Fargo | 70 | B | 0 |
| 16 | 58212 | Aneta | 70 | B | 0 |
| 17 | 58214 | Arvilla | 70 | B | 0 |
| 18 | 58251 | Larimore | 70 | B | 1 |
| 19 | 58254 | Mcville | 70 | B | 0 |
| 20 | 58259 | Michigan | 70 | B | 0 |
| 21 | 58260 | Milton | 70 | B | 0 |
| 22 | 58274 | Portland | 70 | B | 0 |
| 23 | 58282 | Walhalla | 70 | B | 0 |
| 24 | 58318 | Bottineau | 70 | B | 0 |
| 25 | 58330 | Edmore | 70 | B | 0 |
| 26 | 58346 | Leeds | 70 | B | 0 |
| 27 | 58366 | Rolette | 70 | B | 0 |
| 28 | 58413 | Ashley | 70 | B | 1 |
| 29 | 58424 | Cleveland | 70 | B | 0 |
| 30 | 58425 | Cooperstown | 70 | B | 0 |
| 31 | 58438 | Fessenden | 70 | B | 0 |
| 32 | 58442 | Gackle | 70 | B | 0 |
| 33 | 58443 | Glenfield | 70 | B | 0 |
| 34 | 58467 | Medina | 70 | B | 0 |
| 35 | 58472 | Montpelier | 70 | B | 0 |
| 36 | 58492 | Wimbledon | 70 | B | 0 |
| 37 | 58496 | Woodworth | 70 | B | 0 |
| 38 | 58535 | Flasher | 70 | B | 0 |
| 39 | 58542 | Hague | 70 | B | 0 |
| 40 | 58545 | Hazen | 70 | B | 0 |
| 41 | 58558 | Menoken | 70 | B | 0 |
| 42 | 58561 | Napoleon | 70 | B | 0 |
| 43 | 58563 | New Salem | 70 | B | 0 |
| 44 | 58576 | Underwood | 70 | B | 1 |
| 45 | 58580 | Zap | 70 | B | 1 |
| 46 | 58621 | Beach | 70 | B | 0 |
| 47 | 58654 | Sentinel Butte | 70 | B | 0 |
| 48 | 58779 | Ryder | 70 | B | 1 |
| 49 | 58782 | Sherwood | 70 | B | 0 |
| 50 | 58784 | Stanley | 70 | B | 0 |
Overview
North Dakota's At-Large encompasses 407 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (56/100).
395 EPA violations have been recorded across this district's water systems. 30 are health-based violations. About 22% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Consumer Confidence Report Rule - 111 violations
- Revised Total Coliform Rule - 78 violations
- Stage 1 DBP Rule - 73 violations
- Contaminant 1006 - 58 violations
- Stage 2 DBP Rule - 26 violations
Housing Context
Homes in this district were built on average around 1966 (~60 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 1 ZIP code in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
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 407 ZIP codes in North Dakota's At-Large.