Police: Hacker tried to poison city's water supply

On Monday officials from Pinellas County in Florida announced that an unidentified hacker remotely gained access to a panel that controls the City of Oldsmar’s water treatment system, and changed a setting that would have drastically increased the amount of sodium hydroxide in the water supply.

During a press conference, Pinellas County Sheriff Bob Gualtieri said that a legitimate operator saw the change and quickly reversed it, but signaled that the hacking attempt was a serious threat to the city’s water supply. Sodium hydroxide is also known as lye and can be deadly if ingested in large amounts.

“The hacker changed the sodium hydroxide from about one hundred parts per million, to 11,100 parts per million,” Gualtieri said, adding that these were “dangerous” levels. When asked if this should be considered an attempt at bioterrorism, Gualtieri said, “What it is is someone hacked into the system not just once but twice … opened the program and changed the levels from 100 to 11,100 parts per million with a caustic substance. So, you label it however you want, those are the facts.”