Do you mean dihydrogen monoxide? Because Sodium hydroxide is most definitely not water. That much should be obvious by the "sodium" alone.

But Sodium hydroxide is not toxic. The worst it would do is irritate your eyes in the shower. Its used to make soaps and cleaners. Not sure why they went through all that trouble to be slightly annoying to people in that city's water treatment range.

Do you mean dihydrogen monoxide? Because Sodium hydroxide is most definitely not water. That much should be obvious by the "sodium" alone.