Gresham Wastewater Treatment Plant

Treatment PlantThe treatment plant serves 114,000 customers and treats wastewater from the Cities of Gresham, Fairview and Wood Village. Nearly 300 miles of sewer lines in Gresham carry wastewater to the treatment plant from homes, businesses and institutions.

Sewage from homes, schools or businesses is piped by gravity to the wastewater treatment plant on Sandy Boulevard at a rate of more than 13 million gallons each day. The facility treats water before releasing it into the nearby Columbia River, helping to protect our waterways. The plant also uses wastewater – as well as sunshine and grease trucked in from regional food establishments – to produce heat and electricity right on site. 

In 2015 the plant reached energy net zero status, meaning it produces all the electricity it needs each year. This saves ratepayers' money and reduces the human impact on Treatment Basinthe environment. This plant is the first of its kind in the Pacific Northwest and one of only a handful nationwide to achieve net zero status. Learn more about the City's sustainability efforts and energy Net Zero

This video shows what City staff have accomplished.



Waste Water Treatment Plant, 20015 NE Sandy Blvd., Portland, OR 97230, Tel.: 503-618-3450

Tours are available to the public and school groups.


Updated April 17, 2015