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General Information 

The City of Bonney Lake sewer system serves over 5,000 homes and businesses within the City of Bonney Lake's sewer service area. The City maintains 22 sewer lift stations and approximately 74 miles of sewer mains. 

The City of Bonney Lake partners with the City of Sumner for the treatment of the sewage at the Sumner Wastewater Treatment Facility (WWTF). The City of Sumner maintains and operates the plant and bills the City of Bonney Lake monthly for the service. In 2005, the upgrade and expansion of the Sumner Treatment Plant was completed. In 2006 4,400 feet of sewer line between Hwy 162 and Elhi Hill was replaced as a result of an emergency line break. Additional portions of thesewer line were slip-lined between 2007 and 2009. The cities of Sumner and Bonney Lake initiated an upgrade project for the joint Wastewater Treatment Facility in 2010.


Sewer Utility Service & RatesSewer and Water Service Area Map

The City Utilities Department is responsible for billing and taking payment for residential and business sewer use. For sewer utility billing questions please see the Utilities Page or contact the Finance > Utilities desk at (253) 447-4317.

See our Maps Page for the Sewer Service Area Map.

Projects & Informational Resources

Current ProjectsFor sewer projects currently in design or under construction, view the Current Projects interactive map.

For long-range planning and larger sewer projects view the Sewer Comprehensive Plan in the Comprehensive Plan (Utilities element).

View the Fats, Oils, & Grease Program page for information on the City's FOG program.

Lift Station 14 Generator Improvements RFQ Packet

Sewer Issues & After Hours Emergencies

For after hours emergencies related to pump station and grinder pump problems (alarms, strange noises, etc.) and/or broken water mains, please call Dispatch at (253) 798-4721 or toll free 1-844-821-8911. During normal business hours please call the City receptionist at (253) 862-8602 to be directed to the appropriate staff person.




Public Works Center
19306 Bonney Lake Blvd
Bonney Lake, WA 98391
Mailing Address
City of Bonney Lake
Attn: Public Works Sewer Division
19306 Bonney Lake Blvd
Bonney Lake, WA 98391





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