WaterQ

City Water Quality Rankings in South Dakota

87 cities ranked by drinking water quality.

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Popular city water quality comparisons

Aurora, SD vs Batesland, SD Compare → Chamberlain, SD vs Dakota Dunes, SD Compare → De Smet, SD vs Keystone, SD Compare → Lead, SD vs Madison, SD Compare →

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#49
Lake Andes
County, SD
94 A
#50
Parker
County, SD
94 A
#51
Tea
County, SD
94 A
#52
Watertown
County, SD
94 A
#53
Britton
County, SD
93 A
#54
Lemmon
County, SD
93 A
#55
Mission
County, SD
93 A
#56
Brookings
County, SD
92 A
#57
Emery
County, SD
92 A
#58
Garretson
County, SD
92 A
#59
Groton
County, SD
92 A
#60
Hartford
County, SD
92 A
#61
Tabor
County, SD
92 A
#62
Hot Springs
County, SD
91 A
#63
Mitchell
County, SD
91 A
#64
Crooks
County, SD
90 A
#65
Lower Brule
County, SD
89 B
#66
Canton
County, SD
88 B
#67
Clear Lake
County, SD
88 B
#68
Crazy Horse
County, SD
88 B
#69
Fort Thompson
County, SD
88 B
#70
Martin
County, SD
88 B
#71
Sisseton
County, SD
88 B
#72
Wagner
County, SD
88 B

Frequently Asked Questions

How are city water quality rankings calculated in South Dakota?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in South Dakota?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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