An aerial view of a wastewater treatment plant in California. An attempt to poison the Oldsmar, Florida water supply by hijacking a remote access system demonstrates the critical threat tied to failure to properly secure operational technology. (Photo by Justin Sullivan/Getty Images) A new advisory offering details on a remote hackerâs attempted sabotage of an Oldsmar, Florida city water treatment plant has revealed a disregard for certain basic cyber hygiene best practices among employees. Experts say itâs an indicator that operators of critical infrastructure could use a serious infusion of security controls. However, due to budget restrictions, these controls may first require a thorough risk assessment and prioritization exercise.