A coordinated cyberattack targeted operational technology at more than 30 community water systems on Sunday, July 26, and Monday, July 27. This water cyberattack raises an uncomfortable question for towns across America. INVESTIGATORS BELIEVE IRANIAN HACKERS ARE LIKELY BEHIND CYBERATTACK ON MINNESOTA WATER SYSTEMS: REPORTCyberGuy Live: Missed "Sick of Spam?" A cyberattack against a water utility does not automatically mean the water has been contaminated. 2) Do not assume the water is contaminatedA cyberattack may affect communications or automated equipment without changing water quality.