How and where the sewage is disposed in your home?

For primitive household: Waste water would discharge through canal, some would install the open septic tank for toilet water which allow water to absorb down through soil.

For modern household: Usually water from sink, bath tub and washing would discharged directly to municipal sewage system. Water run down the toilet bowl would go through a close septic tank before discharge to municipal sewage.

For apartment or share housing: All water will pass through primary treatment like oil trapping or septic tank then discharge to municipal sewage.