. . "ones and personal care products.Wastewater may contain human sewage, industrial site drainage, toxic waste (e.g. pesticide manufacturing), petroleum waste products or byproducts, for instance.Other wastewater constituents include: Pathogens such as bacteria, viruses, parasites Soluble organic materials such as urea, drugs, pharmaceuticals Macro-solids such as condoms, needles, diapers, sanitary na" . .