Supervisor promptly reversed the action after noticing lye measurements suddenly changing wildly.

Local and federal authorities are investigating how a hacker was able to remotely gain access to a Florida city’s water treatment plant in an unsuccessful attempt at what could have amounted to a mass poisoning.

Yeah, let's give China access to our power grid too. This should be fun.

https://www.theguardian.com/us-news/2021/feb/08/hacker-water-supply-oldsmar-florida