The City's Wastewater Utility’s goal is to protect public and environmental health by ensuring that wastewater is collected and conveyed to treatment and disposal facilities with minimal risk. 

What NOT to Flush Down the Drain: Learn more about what's not flushable, and why.

Options for Disposing of RV Waste: Learn more about free options to dispose of RV waste in the Olympia area.

Our System: Within Olympia and its urban growth area, the wastewater system consists of approximately 200 miles of gravity pipes, 35 miles of pressure pipes, 27 pump stations, and 1,500 STEP systems owned and maintained by the City; 4,000 privately owned and maintained onsite sewage systems; and regional collection and treatment facilities owned by the LOTT Alliance (Lacey-Olympia-Tumwater-Thurston County). 

Wastewater, also known as sewage, comes from residential, commercial, and industrial users.  Flow from storm drains is not generally combined with wastewater, although there are limited exceptions, including several locations in the downtown Olympia area.  Wastewater is a combination of water, suspended solids, and dissolved solids.

Need More Public Works Program Information? Contact the Public Works office.

• Physical Address: 924 7th Ave. SE, Suite A 
• Mailing Address:  PO Box 1967, Olympia, WA 98507
• Download printer-friendly (PDF) directions to our office
• Hours:  Monday - Friday from 8:00 a.m. to 5:00 p.m.
• Phone: (360) 753-8588
• Email:  Public Works