Several top US federal agencies on 14 October 2021 issued a joint advisory around potential cyber threats to the nation's water facilities.
Officials cite "ongoing malicious cyber activity by cyber threat actors targeting the information technology and operational technology networks, systems and devices" of US water and wastewater systems.
See: https://redskyalliance.org/xindustry/water-is-worth-fighting-for
The advisory co-authored by the FBI, Cybersecurity, and Infrastructure Security Agenc