Water Reclamation Facility

The Water Reclamation Facility (WRF) is responsible for protecting the Environment by ensuring that wastewater is properly collected from 4,800 residential and commercial customers and treated prior to discharge to the Stillaguamish River or the City of Arlington Constructed Wetland. Wastewater or Reclaimed Water meets or exceeds the State of Washington standards, as set by the Department of Ecology. The WRF is a Membrane Bio Reactor that is capable of producing 2.67MGD of Reclaimed Water daily.

Collection System

The city’s sanitary sewer collections system consists of 68 miles of sewer main, 8 miles of sewer force main, 1,200 manholes, and 13 Lift Stations. Wastewater Staff clean, video and locate sewer mains on a daily basis. Wastewater Staff also assists in the inspection and documentation of all new construction of sewer infrastructure. View the Sewer Network Schematic Map (PDF).


Pretreatment is the practice of monitoring and mitigating discharges to the sanitary sewer collection system. In 1972, Congress enacted the Clean Water Act (33 U.S.C. 1251 et. Seq.). As part of this historic legislation, the U.S. Environmental Protection Agency developed the General Pretreatment Regulations for Existing and New Sources of Pollution as Published in (40 CFR Part 403) and established requirements and procedures for developing and implementing local programs for enforcing the National Prohibited Discharge Standards, the National Categorical Pretreatment Standards, and locally derived discharge prohibitions and limitations that regulate the introduction of non-domestic wastewater to publicly owned treatment works (POTWs) (sewage treatment plants). Learn Why Pretreatment is Needed (PDF)

Compost Facility

The Wastewater Staff operates a Compost Facility that processes about 70 dry tons of bio-solids into compost yearly. The Compost Facility utilizes the compost produced to subsidize the need for amended soils in various road improvements and new construction. The compost is also utilized in the Parks and Streets Departments for numerous things including but not limited to the following: baseball fields, flower beds, rain gardens, City Parks, and the City of Arlington’s Community Garden.

Report a Concern

Report issues to the City of Arlington