Kennewick wasn't intending to promote Breast Cancer Awareness Month when some city tap water turned a bit pink Friday.
People in the east and northeastern parts of the city woke up to pink water Friday.
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.
State and local health department officials said the chemical doesn't pose any health risks.
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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.