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Commitment to excellence earns honors for King County wastewater treatment facilities

Summary

Four King County wastewater treatment plants earned state and national honors for outstanding performance and environmental compliance in 2012.

Story

Four King County wastewater treatment plants earned state and national honors for outstanding performance and environmental compliance in 2012.

The South Treatment Plant in Renton and the West Point Treatment Plant in Seattle each received Platinum Peak Performance awards from the National Association of Clean Water Agencies, or NACWA.

Platinum level awards indicate multiple consecutive years of compliance with effluent limits established by National Pollutant Discharge Elimination System (NPDES) permit under the federal Clean Water Act and the state’s Water Pollution Control Law.

To date, South Treatment Plant has attained 15 years of 100 percent permit compliance with its effluent limits, and West Point Treatment Plant has attained 11 years of compliance.

King County’s Vashon and Carnation treatment plants, which began operating within the last five years, received Gold awards from NACWA for 100 percent compliance for effluent limits within the past calendar year.

In addition, the Vashon Treatment Plant earned the state Department of Ecology’s “Outstanding Performance Award” in 2012 for meeting all the conditions of its NPDES permit with no violations of any kind.

To comply with state and federal discharge permit effluent requirements, King County’s treatment plants must remove various pollutants from the wastewater in order to meet set limits for biochemical oxygen demand, total suspended solids, fecal coliform counts and total residual chlorine. The permit conditions also require each plant to conduct regular sampling and testing of both its untreated and treated wastewater.

Each day, King County treats and disinfects nearly 200 million gallons of wastewater for more than 1.5 million people in the greater Puget Sound region.

More information about the Peak Performance Awards and list of King County’s prior rankings is available on the Web.