South Dakota Water Quality Ratings

TapWaterSafety has rated 2 public water systems in South Dakota, serving a combined 288,471 residents. The statewide average grade is D.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
D
64/100
Total utilities rated 2
Population served 288,471

Top water quality concerns in South Dakota

  • Arsenic significantly above health guideline
  • Haloacetic acids (HAA9) significantly above health guideline
  • Total trihalomethanes (TTHMs) significantly above health guideline

Cities in South Dakota

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

RAPID CITY
D 72,009
SIOUX FALLS
D 216,462

Grade distribution

A
0 (0%)
B
0 (0%)
C
0 (0%)
D
2 (100%)
F
0 (0%)

All rated utilities in South Dakota

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 RAPID CITY RAPID CITY 72,009 64 D
#2 SIOUX FALLS SIOUX FALLS 216,462 63 D