Remote hacker gained access to computer systems at the water treatment plant in Oldsmar, Florida, and briefly increased the amount of sodium hydroxide in the water by a dramatic amount. The FBI and Secret Service are said to be investigating the security breach and for now the remote access system abused by the hacker has been disabled. The public was never in danger and at no time was there a significant adverse effect on the water being treated. But questions need to be asked about whether remote access to this and other water treatment plants is properly secured.”]
Source: https://grahamcluley.com/a-hacker-tried-to-poison-florida-citys-water-supply/