States/SD

Sewer overflows in South Dakota

Sewer overflow record — reported spills, the worst utilities, and how often overflows reached waterways in South Dakota.

Reported events
177
Total volume
2.9B gal
Reached waterways
0(0%)
Latest event
Jun 25, 2026

Worst utilities in South Dakota

Ranked by number of reported overflow events.

#UtilityEventsVolumeReached water
1Rapid City, City of SSCS234.1M gal0
2Hot Springs, City of SSCS185.4M gal0
3Sioux Falls, City of SSCS163.0M gal0
4Pierre, City of SSCS15596K gal0
5Aberdeen, City of SSCS112.8B gal0
6Mitchell, City of SSCS114.5M gal0
7Watertown, City of SSCS62K gal0
8Spearfish, City of SSCS595K gal0
9Ft. Pierre, City of SSCS43K gal0
10Huron, City of SSCS464K gal0
11Powder House Pass CID SSCS43K gal0
12Yankton, City of SSCS42.0M gal0
13Canton, City of SSCS3500 gal0
14Willow Lake, City of SSCS32.2M gal0
15Vermillion, City of SSCS31.1M gal0
16Apple Springs Resort (H2O Clear Solutions LLC) SSC30 gal0
17Langford, Town of SSCS27.8M gal0
18Sturgis, City of SSCS211 gal0
19Salem, City of SSCS23.0M gal0
20Worthing, City of SSCS293K gal0
21Hartford, City of SSCS26K gal0
22Estelline, City of SSCS2100K gal0
23Brandon, City of SSCS26K gal0
24USCOE - OAHE DAM SSCS2251 gal0
25Colman, City of SSCS110K gal0
26Scotland, City of SSCS12 gal0
27Tripp, City of SSCS14.9M gal0
28Custer, City of SSCS1150 gal0
29Lennox, City of SSCS10 gal0
30USNPS - Mt. Rushmore National Memorial SSCS11K gal0

Biggest spills in South Dakota

The largest single reported overflow events.