ABSTRACT
Proper sewage disposal is necessary to protect human health, welfare, and the economy. The contaminated liquids and solids from sewers may back flow into streets, properties, businesses, and homes, or overflow into bodies of water, underground or on the surface. Sanitary sewage may contain bacteria, viruses, and other microorganisms, as well as a variety of chemicals, including heavy metals and pharmaceuticals that can cause disease. Industrial waste coming from businesses and industry, mixed into the public sewage in the sewers, can contain a huge variety of chemicals and other substances which can affect the health of individuals. Correction of the sewerage system problems constitutes a huge financial burden on communities throughout the country (See endnotes 3, 28, 38).
