The number of Minnesota towns that reported hacks of their water systems is up to four

-Braham: https://dysruptionhub.com/braham-minnesota-water-cyberattack/
-Maple Plain: https://dysruptionhub.com/maple-plain-water-cyber-incident/
-Plymouth: https://dysruptionhub.com/plymouth-minnesota-water-cyberattack/
-St. Paul: https://dysruptionhub.com/south-st-paul-water-cyber-incident/