What Happens to Rain After It Hits the Street
Rain falling on a road runs to the kerb, drops through a gully, and travels to a river, lake, or the sea — in most towns with no treatment at all. That is the surprise: the storm drain and the foul sewer are two separate networks, and only one ends at a treatment works.
Anything poured into a street gully arrives in open water largely unchanged, and two public behaviours follow directly from misunderstanding that split. Oil, paint, and cleaning water get tipped down gullies on the assumption they will be treated, and blocked gullies go unreported because residents assume the drain is someone else's business until the road floods. The one thing to withhold is a promise about response times: naming a clearance window for a reported blockage creates an expectation the maintenance schedule may not meet.
This template covers the network in six scenes: two following one street's rainfall from kerb to outfall, one contrasting the storm drain with the foul sewer, one on what a blocked gully does in a heavy downpour, one on what must never be poured into a drain, and one on how to report a blockage.
.PNG)
.PNG)
.PNG)
