Olympia's Sewer System
The Olympia Wastewater Utility's goal is to protect public and environmental health by ensuring that wastewater, also known as sewage, is collected and conveyed to treatment and disposal facilities with minimal risk.
Within Olympia and its urban growth area, the wastewater system consists of approximately 185 miles of gravity pipes, 35 miles of pressure pipes, 31 pump stations, and 1,800 STEP systems owned and maintained by the City; 4,150 privately owned and maintained septic systems; and regional collection and treatment facilities owned by the LOTT Cleanwater Alliance (Lacey-Olympia-Tumwater-Thurston County).
Sewer Lookup Map
Customers, developers, real estate professionals and contractors can use this map to find out whether a property has a sewer connection (gravity, S.T.E.P. or grinder) or a septic system, or to see how close a property is to a sewer line.
• Go to our Sewer Lookup Map
Septic to Sewer
Septic systems in urban areas can pose a risk to the environment, water quality and public health. Our Septic to Sewer program offers a variety of incentives to help property owners who are considering converting a septic system to public sewer.
• Go to our Septic to Sewer page
STEP System Information
Some homes in Olympia utilize a STEP (Septic Tank Effluent Pump) system. If your home has a STEP system, find important information including what to do if your alarm goes off here. If you're not sure if you have a STEP system, use the Sewer Lookup Map above.
• Go to our Step Information page
RV Waste Disposal
RV Waste can be disposed of at the LOTT Cleanwater Alliance's RV dump site in downtown Olympia during regular business hours (closed weekends and holidays). In addition, LOTT maintains a list of other dump stations throughout the Puget Sound area.
• Get details on the LOTT website