Washington state sewage spill blamed on sensor malfunction

12/16/2009 | SeattlePI.com

A malfunctioning sensor in Magnolia, Wash., caused 9 million gallons of untreated wastewater to flow into Elliott Bay. The sensor at the West Point Treatment Plant misread water levels, causing an emergency bypass gate to open. The plant treats about 130 millions of gallons of water per day from Seattle and several other cities.

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