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EPA WATER QUALITY DATA · SD

South Dakota Tap Water Quality by City

EPA UCMR5 PFAS monitoring data, violation history, and filter recommendations for 1 cities across South Dakota. All data sourced directly from federal EPA databases.

1
Cities tracked
1
With PFAS violations
21 ppt
Highest PFAS detected
Highest contamination in South Dakota: Sioux Falls — detected at 21 ppt (5× the EPA limit for PFOA/PFOS)
SOUTH DAKOTA CITIES — TAP WATER REPORTS
Sioux FallsMEDIUM RISK2 MCL VIOLATIONS
Sioux Falls Water Purification Plant · Pop. 195K
21
ppt PFAS
ABOUT WATER QUALITY IN SOUTH DAKOTA

South Dakota water quality varies significantly by city and water system. The EPA's UCMR5 monitoring program tested all systems serving 3,300+ people for 29 PFAS compounds between 2023 and 2025. In South Dakota, 1 of the 1 tracked cities returned results with active MCL violations — meaning detected PFAS levels exceed the EPA's legally enforceable maximum.

Click any city above for a full breakdown of detected compounds, violation history, water hardness data, and certified filter recommendations matched to the actual contaminant profile of that system.

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