Which of the following would not be considered domestic sewage?

The classification of domestic sewage involves determining the sources of wastewater that typically originate from residential, commercial, or institutional areas. Domestic sewage primarily comes from human activities and is commonly associated with household usage.

Toilet waste, kitchen sink waste, and laundry waste all spring from typical household functions, directly related to human consumption and sanitation practices. They are therefore classified as domestic sewage because they involve waste generated within a residential setting.

On the other hand, dairy cattle waste originates from agricultural operations and involves waste management practices distinct from those of a household. This waste is typically linked to animal husbandry and agricultural production rather than residential activities. As such, it does not fit within the common definition of domestic sewage; instead, it is regarded as agricultural runoff or livestock manure. This distinction is critical for environmental health professionals in understanding the implications of waste management, treatment, and regulation.