STATE REPORT
SD
24 HEALTH VIOLATIONS
South Dakota Water Quality & Safety Report
43 ZIP codes · 74 water systems · UPC plumbing code · Updated 2026-03-16
Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16
43
ZIP Codes
74
Water Systems
18
ZIPs with Violations
UPC
Plumbing Code
Overview
We track water quality, weather alerts, plumbing regulations, and energy rebates for 43 ZIP codes across South Dakota, covering 74 community water systems that serve approximately 458,431 people.
18 of 43 ZIP codes (42%) have recorded EPA violations. 24 health-based violations have been documented.
Plumbing Regulations
South Dakota follows the Uniform Plumbing Code (2018 edition).
- Plumbing code: UPC (2018)
- Homeowner DIY: Licensed plumber required
- Water heater permit: Required
- Annual backflow test: Required
Full South Dakota regulations →
Areas with Most Violations
| ZIP Code | City | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|---|
| 57040 | Lesterville | — | 23 | 0 | LESTERVILLE |
| 57401 | Aberdeen | — | 19 | 14 | ABERDEEN |
| 57001 | Alcester | — | 8 | 0 | ALCESTER |
| 57005 | Brandon | — | 8 | 0 | BRANDON |
| 57350 | Huron | — | 6 | 3 | HURON |
| 57004 | Beresford | — | 5 | 0 | SOUTH LINCOLN RURAL WATER SYSTEM |
| 57101 | Sioux Falls | — | 5 | 1 | SIOUX FALLS |
| 57006 | Brookings | — | 4 | 0 | BROOKINGS MUNICIPAL UTILITIES |
| 57026 | Elkton | — | 4 | 0 | ELKTON |
| 57028 | Flandreau | — | 4 | 2 | FLANDREAU |
Areas with No Violations
| ZIP Code | City | Safety Score | System | Population |
|---|---|---|---|---|
| 57002 | Aurora | — | AURORA | 1,200 |
| 57013 | Canton | — | CANTON | 3,066 |
| 57014 | Centerville | — | CENTERVILLE | 918 |
| 57017 | Colman | — | COLMAN | 634 |
| 57018 | Colton | — | COLTON | 738 |
| 57020 | Crooks | — | CROOKS | 1,362 |
| 57022 | Dell Rapids | — | MINNEHAHA COMMUNITY WATER CORP | 13,435 |
| 57025 | Elk Point | — | ELK POINT | 2,124 |
| 57029 | Freeman | — | FREEMAN | 1,329 |
| 57030 | Garretson | — | GARRETSON | 1,228 |
Lead & Copper
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
- High risk (Zone 1): 0 ZIP codes (0%)
- Moderate risk (Zone 2): 0 ZIP codes
- Low risk (Zone 3): 0 ZIP codes
All 43 ZIP Codes in South Dakota
- 57401 (Aberdeen) — 19 violations ⚠
- 57001 (Alcester) — 8 violations
- 57002 (Aurora)
- 57003 (Baltic) — 1 violation
- 57004 (Beresford) — 5 violations
- 57005 (Brandon) — 8 violations
- 57006 (Brookings) — 4 violations
- 57012 (Canistota) — 3 violations
- 57013 (Canton)
- 57014 (Centerville)
- 57325 (Chamberlain)
- 57015 (Chancellor) — 1 violation
- 57017 (Colman)
- 57018 (Colton)
- 57020 (Crooks)
- 57022 (Dell Rapids)
- 57024 (Egan) — 2 violations
- 57025 (Elk Point)
- 57026 (Elkton) — 4 violations
- 57028 (Flandreau) — 4 violations ⚠
- 57029 (Freeman)
- 57030 (Garretson)
- 57031 (Gayville)
- 57032 (Harrisburg)
- 57033 (Hartford)
- 57034 (Hudson)
- 57035 (Humboldt)
- 57036 (Hurley)
- 57350 (Huron) — 6 violations ⚠
- 57037 (Irene)
- 57038 (Jefferson)
- 57039 (Lennox)
- 57040 (Lesterville) — 23 violations
- 57042 (Madison)
- 57043 (Marion)
- 57045 (Menno)
- 57252 (Milbank) — 3 violations
- 57046 (Mission Hill) — 3 violations ⚠
- 57048 (Montrose) — 4 violations
- 57049 (North Sioux City)
- 57701 (Rapid City)
- 57101 (Sioux Falls) — 5 violations ⚠
- 57783 (Spearfish) — 4 violations ⚠
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Regulations: State plumbing boards, ICC, IAPMO
- Rebates: Rewiring America
Updated daily.