Memba this? From last year
On Feb. 5, a plant operator for the city of about 15,000 on Florida’s west coast saw his cursor being moved around on his computer screen, opening various software functions that control the water being treated. The intruder boosted the level of sodium hydroxide—or lye—in the water supply to 100 times higher than normal.
Sodium hydroxide, the main ingredient in liquid drain cleaners, is used to control water acidity and remove metals from drinking water in treatment plants. Lye poisoning can cause burns, vomiting, severe pain and bleeding.
https://www.pewtrusts.org/en/research-and-analysis/blogs/stateline/2021/03/10/florida-hack-exposes-danger-to-water-systems