What type of sewage does domestic septage exclude?

Domestic septage typically refers to the waste that accumulates in residential septic tanks and other domestic waste treatment systems. It primarily includes human waste and some associated household water waste. However, it specifically excludes waste types that are not primarily generated from typical domestic activities.

Liquid from a portable toilet, solid material from cesspools, and disposal of animal waste are all considered different categories of waste that do not fall under the classification of domestic septage.

Liquid from a septic tank that receives commercial wastewater, on the other hand, is excluded because it contains a mixture of domestic wastewater along with potentially hazardous wastewater from commercial operations. This commercial wastewater can have a significantly different composition and may require different handling and treatment than residential septage. Thus, the key distinction for domestic septage is its origin, which is solely from residential sources, excluding any commercial influences.