Residents in the east and northeastern parts of Kennewick woke up to pink water this morning.
A check valve failed to close all the way after a power outage Thursday night at the city’s water treatment plant, allowing a chemical used as an oxidizer to treat organic materials in the water to get into the water supply. City of Kennewick utility services manager Gary Deardorff said an unknown amount of sodium permanganate got into the water, which diluted the chemical’s color.
“It’s deep purple,” he said.
Deardorff said state and local health department officials told him that the chemical doesn't pose any health risks.
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The water appeared to be clear by late Friday morning, he said.