South Dakota — At-Large
119th Congress · 392 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in South Dakota's At-Large. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 57037 | Irene | 88 | A | 0 |
| 2 | 57381 | Wessington | 87 | A | 2 (1 health) |
| 3 | 57353 | Iroquois | 85 | A | 1 |
| 4 | 57317 | Bonesteel | 83 | B | 0 |
| 5 | 57523 | Burke | 83 | B | 0 |
| 6 | 57529 | Dallas | 83 | B | 0 |
| 7 | 57533 | Gregory | 83 | B | 0 |
| 8 | 57543 | Kadoka | 83 | B | 0 |
| 9 | 57559 | Murdo | 83 | B | 0 |
| 10 | 57567 | Philip | 83 | B | 0 |
| 11 | 57580 | Winner | 83 | B | 0 |
| 12 | 57626 | Faith | 83 | B | 0 |
| 13 | 57656 | Timber Lake | 83 | B | 0 |
| 14 | 57706 | Ellsworth Afb | 83 | B | 0 |
| 15 | 57716 | Batesland | 83 | B | 0 |
| 16 | 57720 | Buffalo | 83 | B | 0 |
| 17 | 57732 | Deadwood | 83 | B | 0 |
| 18 | 57741 | Fort Meade | 83 | B | 0 |
| 19 | 57754 | Lead | 83 | B | 0 |
| 20 | 57760 | Newell | 83 | B | 0 |
| 21 | 57767 | Owanka | 83 | B | 0 |
| 22 | 57790 | Wall | 83 | B | 0 |
| 23 | 57579 | White River | 82 | B | 5 (1 health) |
| 24 | 57601 | Mobridge | 82 | B | 2 |
| 25 | 57625 | Eagle Butte | 82 | B | 16 (1 health) |
| 26 | 57738 | Fairburn | 82 | B | 10 (1 health) |
| 27 | 57747 | Hot Springs | 82 | B | 2 |
| 28 | 57788 | Vale | 82 | B | 9 (1 health) |
| 29 | 57552 | Midland | 81 | B | 13 (2 health) |
| 30 | 57718 | Black Hawk | 81 | B | 2 (2 health) |
| 31 | 57761 | New Underwood | 81 | B | 13 (2 health) |
| 32 | 57763 | Oelrichs | 81 | B | 4 |
| 33 | 57709 | Rapid City | 80 | B | 0 |
| 34 | 57769 | Piedmont | 80 | B | 5 (3 health) |
| 35 | 57528 | Colome | 79 | B | 6 (3 health) |
| 36 | 57791 | Wasta | 79 | B | 3 |
| 37 | 57793 | Whitewood | 79 | B | 3 |
| 38 | 57730 | Custer | 78 | B | 0 |
| 39 | 57745 | Hill City | 78 | B | 4 |
| 40 | 57751 | Keystone | 78 | B | 0 |
| 41 | 57799 | Spearfish | 78 | B | 4 (1 health) |
| 42 | 57722 | Buffalo Gap | 77 | B | 23 (2 health) |
| 43 | 57766 | Oral | 77 | B | 6 |
| 44 | 57623 | Dupree | 76 | B | 2 |
| 45 | 57633 | Isabel | 76 | B | 0 |
| 46 | 57701 | Rapid City | 76 | B | 0 |
| 47 | 57702 | Rapid City | 76 | B | 0 |
| 48 | 57703 | Rapid City | 76 | B | 0 |
| 49 | 57551 | Martin | 75 | B | 8 |
| 50 | 57785 | Sturgis | 75 | B | 4 |
Overview
South Dakota's At-Large serving an estimated 5,999,040 residents encompasses 392 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (60/100).
761 EPA violations have been recorded across this district's water systems. 138 are health-based violations. About 26% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Revised Total Coliform Rule — 251 violations
- Consumer Confidence Report Rule — 243 violations
- Chlorine residual — 66 violations
- Stage 1 DBP Rule — 41 violations
- Fecal Coliform — 29 violations
Housing Context
Homes in this district were built on average around 1962 (~64 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 392 ZIP codes in South Dakota's At-Large.