Civil Engineering PE

Answer: C - Raw wastewater can potentially contain pathogens and microconstituents. Pathogens (disease causing organisms) commonly found in wastewater include bacteria, viruses, and protozoa. Microconstituents are substances (naturally occurring and manmade) which include inorganic and organic elements that are detected in water that may have a potential impact on human health and the environment. The detection of microconstituents in an influent wastewater stream presents continuing challenges to municipal engineers responsible for designing treatment systems to remove the potentially harmful elements.