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CH2MHill Operations Supervisor Paul Olson pulls a long UV light tube from a full bank of tubes while talking about how hundreds of UV lights are used to help clean and clarify waste water at the City of Walla Walla Waste Water Treatment Plant. Thursday, May 13, 2010

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Walla Walla wastewater goes down the drain, and then?

Walla Walla's wastewater treatment process takes about a day for any given flush, resulting in clean water to put back in Mill Creek.

WALLA WALLA -- Do you ever wonder what happens to the water in the toilet after you flush it? We often do not think about the people and the processes that work day in, day out to make the essential service of wastewater treatment possible.


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