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Stormwater: Runoff — What is it anyway?

It seems innocent enough. You might look out your window one day and see rainwater in puddles here and there on your driveway and sidewalks. Something as simple as rainwater becomes a problem, however, when it becomes stormwater runoff.


Stormwater runoff occurs when rain or snowmelt flows over the ground and is prevented from soaking into the earth because of driveways, sidewalks and streets. Stormwater can pick up debris, chemicals, dirt and other pollutants and flow into a storm sewer or directly into a lake, stream, wetland or coastal water. Anything that enters a storm sewer system is discharged untreated into water bodies we use for swimming, fishing and providing drinking water.


Polluted stormwater runoff can have many adverse effects on plants, fish, animals and people. No one intentionally wants to contaminate the water. Here’s what you can do to prevent pollution.

Read more here: pdfStormwater_Runoff.pdf