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South Dakota · EPA ECHO (national)
Yankton, City of SSCS
Permit SD0023396
—
No waterway impact reported
Reported events
4
Total volume
2.0M gal
Reached waterways
0 (0%)
Reporting since
2025
What caused the overflows
Equipment Failure
4
Reported overflow events (showing 4 of 4)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Apr 23, 2026 | 1.5M gal | Equipment Failure | — | Missouri River |
| Jan 29, 2026 | 60K gal | Equipment Failure | — | Missouri River |
| Nov 16, 2025 | 480K gal | Equipment Failure | — | Missouri River |
| Sep 21, 2025 | 30K gal | Equipment Failure | — | Missouri River |
Source: EPA ECHO (national). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.