Whats the difference between a storm drain and a sewage drain?
Sewage frains contain human and industrial waste and in the EU, USA, and similar countires, the water goes to a treatment plant before clean water is discharged to lake, stream, or ocean. Storm water is that which results from rain. It can be collected in street drains, side ditches, or just overland flow. Storm water in most places goes directly in the water body, sometimes through a settling pond first. However, in some older cities, some stormwater is collected and added to the sewage system. Richmond, VA is an example.
