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February 8, 2021 10:10 pm

Hacker Increased Chemical Level At Florida City's Water Supply, Police Say

An anonymous reader quotes a report from WTSP: hacker gained access to Oldsmar's water treatment plant, bumping the sodium hydroxide in the water to a "dangerous" level, according to Pinellas County's sheriff. In a press conference Monday, Sheriff Bob Gualtieri said his deputies, along with the FBI and U.S. Secret Service, are investigating the breach as it is unclear if it came from within the U.S. or from a foreign actor. The incident first occurred on Feb. 5 at the city's water treatment plant when, around 8 a.m., an operator noticed someone had remotely entered the computer system that he was monitoring. It's a system responsible for controlling the chemicals and other operations of the water treatment plant, Gualtieri said. And this time, Gualtieri says, the hacker did more than just remote in. According to the sheriff, the hacker spent up to five minutes in the system and adjusted the amount of sodium hydroxide in the water from 100 parts per million to 11,100. "This is obviously a significant and potentially dangerous increase. Sodium hydroxide, also known as lye, is the main ingredient in liquid drain cleaners," Gualtieri added. The operator immediately reduced the levels back to the appropriate amount and "at no time was there a significant adverse effect on the water being treated." Even if the operator did not notice the intrusion, the sheriff, Oldsmar Mayor Eric Seidel and City Manager Al Braithwaite all noted several fail-safes and alarm systems are in place to flag issues of this kind. Gualtieri reinforced that at no time was the public in danger.

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