Report: Oldsmar water hack came after city computer visited compromised website Investigation finds watering-hole attack discovered targeting water utilities WFTS and last updated 2021-05-19 15:48:10-04 OLDSMAR, Fla. â An Oldsmar city computer reportedly visited a website hosting malicious code that targeted water utilities in the hours leading up to the cityâs water treatment plan being hacked, a new report from the security firm Dragos said. The Oldsmar water hack saw someone try to poison the water supply with lye, but it was discovered before any damage could be done. While the website ultimately didnât play a role in the hack of the water supply system in Oldsmar, Dragos said the overall incident shined a light on IT security in the infrastructure in the United States.