What is stormwater runoff?

Stormwater runoff is naturally occurring water originating as rain, melting snow, or groundwater that is not able to seep into the ground but instead travels across the land surface. There are many reasons why water is unable to infiltrate into the ground. Surfaces altered by human activities, certain types of soil, ground that is already fully saturated from previous rain events, and rain fall intensity can all affect how much water is able to be absorbed into the ground and how much is left on the surface. Runoff then flows to lower areas which are usually a nearby stream, creek, river, lake, ocean or in the case of urbanized areas a storm drain structure.

Show All Answers

1. What is stormwater runoff?
2. What is polluted runoff?
3. What is Nonpoint Source Pollution
4. What causes polluted Stormwater Runoff?
5. Why do we need to manage stormwater and polluted runoff?
6. How is stormwater runoff "managed"?
7. Why all the recent fuss about stormwater?
8. If stormwater pollution only affects streams and creeks, why should I care?
9. How are stormwater fees used?
10. How does this benefit the average taxpayer?
11. Ten things you can do to prevent stormwater runoff erosion
12. How can I help reduce storwater pollution in my area?