Waste Water

Treatment Plant Location

The treatment plant is located at 501 Annahat Road, east of North Myers Road.


The City of Toppenish is committed to providing our community with quality, uninterrupted waste water services.

The waste water treatment facility is equipped with a dual sewer system consisting of sanitary and under drain sewers. The purpose of the sanitary sewer system is to carry wastewater from residences and commercial buildings to the waste water treatment plant. Under drains remove groundwater from the sanitary sewer areas and provide storm drainage. There are approximately 27.3 miles of collector sanitary sewer lines, 3.3 miles of interceptor sewers, and six pumping stations. The average winter waste water demand is .92 millions gallons per day (MGD) and the summer demand peaks at 1.9 MGD.

For further information, please contact the Public Works Department at (509) 865-4500. If you have questions about your sewer bill, please contact the Finance Department at (509) 865-2080. If you have water or sewer emergencies after 5:00 PM, please contact the Toppenish Police Department at (509) 865-4355.