Katie Mazarac just wanted to give her daughter a bath.
It was late summer evening, and the small Louisiana fishing community where she and her then 18-month-old live had been plagued by water issues for months. Saltwater from the ocean had been creeping up the Mississippi River since June, making the water in her town undrinkable. At one point, Mazarac had resorted to bathing her daughter in a reusable tote bag, using gallons of bottled water.