What happens when you flush a toilet?

Question

Where does the waste go, and how is it treated? How efficient is the processing?

In: 3

Answer 1

some older cities do not have separate storm sewer and sanitary sewer, but most newer cities have two sewer systems.

the storm sewer can drain directly into river/lake/ocean but sanitary sewer gets treated before dumping. in many cities they’ve painted pictures of fish on the storm sewer drains to remind people not to dump into them: eg, wash your car on the driveway where the runoff hits the grass instead of directly into the storm sewer.