Water Drainage System 

The sanitary sewer system also known as the “sewer system”, collects and disposes of waste and fluids from the internal plumbing system (toilets, shower, bath, laundry, sinks etc) of homes or other type of buildings. The storm sewer system typically referred to as the “drainage system”, collects and gets rid of the water from outside of the buildings, (roof downspouts, foundation drains, driveways, lawns etc.). The District of Mission uses both a Sanitary Sewer System and a separate Storm Sewer System. Some communities operate only a single sewer system (often referred to as a Combined Sewer System) where both internal and external fluids are collected and disposed of via a single sewer main system. The storm drainage system is a combined 100 kilometers of sewer mains, 140 kilometers of roadside ditches and even more streams and small rivers inside the district. The system relies on gravity to pull the water downhill into other areas with the exception of three stations that are operated and maintained by the District, pumps water through the dykes during high water level caused by the Fraser River Freshet.