Iran-style hackers shut down a Minnesota town’s water plant. Only the water tower saved it

Over 30 water systems in Minnesota faced cyberattacks this week. State officials are investigating the incidents that disrupted operational controls at multiple local plants. In the town of Braham, officials temporarily lost the ability to control their water treatment equipment, requiring the city to rely on reserve water held in a local tower to maintain supply.

While investigations into the source are ongoing, state and federal agencies have flagged recent warnings regarding foreign entities targeting critical U.S. infrastructure. Federal authorities, including the FBI and the Cybersecurity and Infrastructure Security Agency, recently issued advisories concerning hackers with ties to Iran looking for vulnerabilities in water and wastewater systems.

Most of the targeted systems saw interference with remote monitoring and control technology. These components are often difficult for smaller municipalities to secure, as local plants frequently lack the resources for frequent software updates or advanced security protocols. This vulnerability makes them attractive targets for actors seeking to create public alarm or service disruption.

State IT officials confirmed that no water quality issues resulted from the attacks. Most communities remained online through manual operation or backup protocols while crews worked to restore communications. Authorities continue to monitor the situation to determine if a single entity is responsible for the coordinated wave of activity across the state.