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Visit the City of Anacortes Wastewater Treatment Plant (WWTP) page for more information.

Are the storm drain and sewer drain the same thing?
No. Stormwater is conveyed directly to creeks and Puget Sound without treatment. Sanitary sewer is collected and treated at the City of Anacortes Wastewater treatment plant and then discharged into Puget Sound. 

Can I dump biodegradable products into the storm drain? No. Biodegradable does not mean the product is non-toxic to aquatic life.

Can I flush cleaning rags like Clorox and Pledge down the toilet? Only if the cleaning product states that they are flushable, then yes you can.  Most products do not state that they are flushable so if you flush them down the toilet they will get caught up the pump station and plug the system.  They could also plug up your toilet.  So look for the word “flushable” on the product.

Does the wastewater treatment plant smell bad? The plant has a sophisticated odor control system. In 2010, the City completed a 1 million dollar upgrade to our Odor Control system at the WWTP. The system prevents odors from escaping from the treatment plant site. The City considers the control of odors at the wastewater treatment plant to be one of the highest operating priorities. Wastewater Plant Operators also work hard at preventing odors from the sewer collection and pumping systems. These systems may produce odors that are in areas not close to the treatment plant. If you smell odors from the plant or the sewer collection system, it is important to notify the plant operating staff immediately. During working hours a plant operator will respond right away, please call the plant immediately at 299-0953. 

Can the City help me if I have a plugged sewer? Yes, we can check the City-owned sewer main and help locate the problem before you call a plumber. 

What is the capacity of the Wastewater Treatment Plant? The capacity of the treatment plant is established by the Dept. of Ecology. The current rated capacity of the plant is 4.5 million gallons of wastewater per day. During 2011, the average daily flow at the plant was 1.92 million gallons per day.

When will the wastewater treatment plant need to be upgraded? The plant has lots of excess treatment capacity. There are no plans to expand the treatment plant capacity in the near future.

Where can I dump my travel trailer waste? You can stop at our Waste Water Treatment Plant facility at 500 T Avenue Anacortes, WA 98221 or call 360-299-0953 for more information.  Between the hours of 8:00 am and 4:30 p.m., 7 days a week except holidays open 8:00 a.m. to 11:30 a.m.

Where does the water go after it is treated at the wastewater plant? Treated water from the wastewater treatment plant is piped out into the Guemes Channel. The end of the pipe is located just to the west of the Port of Anacortes Pier 2.


City of Anacortes Wastewater Treatment Plant (WWTP)
500 T Avenue
Mailing Address: 500 T Ave Anacortes WA 98221
Wastewater Treatment Plant Telephone: (360) 299-0953
Fax: (360) 299-9206