Untreated wastewater and its contents. Raw sewage is produced by the community and large consists of feces, debris, sanitary appliances such as towels, plastics, and industrial wastes. Of all these contents, excrement provides the primary contribution to raw sewage through dangerous biological substances, parasites, bacteria, and viruses. Raw sewage generally makes its way from the plumbing system into the sewage system and eventually reaching the sewage facilities or in other locations.