Most communities like Upton have completely separate systems. The sewer system, also known as the sanitary sewer or wastewater sewage system, conveys household, commercial and industrial wastewater through a separate plumbing system into an underground sewer pipe system. Wastewater in the sanitary sewer system is from sources such as water and waste from sinks, toilets, and washers, to name but a few. Discharges to the sanitary sewer system are conveyed and treated at the Upton Wastewater Treatment Plant prior to being discharged into West River. The storm drain system, on the other hand, discharges primarily untreated stormwater runoff directly into the local water bodies.