What are the three main sources of wastewater?

The correct answer identifies the three primary sources of wastewater as domestic, industrial, and infiltration/overflow.

Domestic wastewater originates from household activities, such as bathing, cooking, and washing, where water is used and subsequently discharged. This category is often significant in municipal wastewater systems since a large portion of the population contributes to it through residential plumbing.

Industrial wastewater stems from manufacturing processes and other industrial activities. Different industries may generate varying types and volumes of wastewater, often containing specific contaminants that need to be treated uniquely before being discharged into the environment.

Infiltration/overflow refers to the unintentional entry of stormwater or groundwater into the wastewater collection system. This can occur due to the aging or damage to sewer pipes, leading to excess water that can overwhelm treatment facilities, thereby necessitating additional management strategies to handle this influx.

The other options list various categories of sources that do not encompass the main types of wastewater generated in municipal contexts. For example, focusing solely on residential, commercial, and agricultural sources misses the crucial definitions of industrial processes and the impact of system dynamics like infiltration. Similarly, the other combinations do not accurately represent the main categories typically recognized in wastewater management literature.