WaterQ

City Water Quality Rankings in South Dakota

87 cities ranked by drinking water quality.

All States AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY

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 →

Trending Cities

Fairbanks, AK Fresno, CA San Jose, CA Sacramento, CA San Francisco, CA Houston, TX Fargo, ND
#1
Aurora
County, SD
100 A
#2
Batesland
County, SD
100 A
#3
Chamberlain
County, SD
100 A
#4
Dakota Dunes
County, SD
100 A
#5
De Smet
County, SD
100 A
#6
Keystone
County, SD
100 A
#7
Lead
County, SD
100 A
#8
Madison
County, SD
100 A
#9
Murdo
County, SD
100 A
#10
Philip
County, SD
100 A
#11
Pierre
County, SD
100 A
#12
Spearfish
County, SD
100 A
#13
Toronto
County, SD
100 A
#14
Agency Village
County, SD
98 A
#15
Deadwood
County, SD
98 A
#16
Egan
County, SD
98 A
#17
Harrisburg
County, SD
98 A
#18
Kimball
County, SD
98 A
#19
Lennox
County, SD
98 A
#20
Mobridge
County, SD
98 A
#21
Oral
County, SD
98 A
#22
Sioux Falls
County, SD
98 A
#23
Tyndall
County, SD
98 A
#24
Vermillion
County, SD
98 A

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.

Explore More Water Quality Data

State Rankings National Rankings Compare Cities All Water Systems