Comprehensive analysis of 317 public water systems across Minnesota. Rankings based on lead levels, nitrate levels, PFAS detection, and EPA violations.
62/100
Across all water systems
317
Public water systems
Nov 30, 2025
Data refreshes daily
View water quality rankings for specific regions of Minnesota
Top performing water systems
Blaine
MN1020006
85/100
ST CLOUD
MN1730055
85/100
PRIOR LAKE
MN1700020
85/100
Belle Plaine
MN1700001
75/100
Benson
MN1760008
75/100
Systems needing improvement
Rochester
MN1550003
0/100
Mankato
MN1070012
20/100
Columbia Heights
MN1020016
20/100
Monticello
MN1860013
30/100
CASS LAKE
055294205
30/100
Our water quality score (0-100) is calculated using a weighted formula based on EPA standards:
Perfect score below 5 ppb, scales to 0 at EPA action level (15 ppb)
Perfect score below 3 ppm, scales to 0 at EPA MCL (10 ppm)
Zero points for any health-based violations
Bonus points for no PFAS detected, penalty if detected
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