answersLogoWhite

0

There are usually two kinds of drain, sewage and stormwater.

Sewage runs from your toilet to a treatment plant that usually removes solids and cleans the water well enough to be put back into rivers and waterways, and eventually, the ocean.

Stormwater takes the water runoff from rooftops and streets and runs it into waterways without any purifying or cleaning. There may be some rough grills and gratings to capture floating debris like plastic bottles.

In some areas without sewer pipes septic tanks are used to collect sewage. These tanks are regularly pumped out and the sewage is taken to a treatment plant.

User Avatar

Wiki User

7y ago

What else can I help you with?