In addition to treating the City of Anacortes waste water flow the plant also accepts septage waste and RV / Trailer holding tank waste. RVs, small boats and trailers may dump their holding tanks for free at the treatment plant. The RV dump station, located on the 4th St side of the plant, is open from 8 a.m. to 4:30 p.m. seven days a week. The dump station is open from 8 a.m. to 11:30 a.m. on holidays. Potable water is available for RV and trailers at the plant administration building at 500 T Ave. The potable water hose is attached to the building at the right of the front door. If assistance is needed please feel free to come inside and the receptionist will alert an operator to help.
Septic Haulers also use the facility; the septage waste facility is a fee based system that currently charges the haulers 10 cents per gallon for waste originating on Fidalgo Island and 12 cents per gallon for waste coming from off of the island. Septage haulers are encouraged to contact the plant administration building at 500 T Ave to set up a waste hauler account.