What is a Watershed?
All of the land that drains to a common receiving body of water. In Contra Costa County we have 32 watersheds, several of these share boundaries with Alameda County. Watersheds are commonly named for the waterway or water body they flow to.

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1. What is a Watershed?
2. What is the difference between the County Watershed Program and Contra Costa Clean Water Program?
3. When is my street swept?
4. What is an illicit discharge and who do I call to report it?
5. What’s the difference between the storm drain system and the sanitary sewer?
6. What’s the difference between point source and non-point source?
7. What’s the difference between a Stormwater Pollution Prevention Plan (SWPPP) and a Stormwater Control Plan (SWCP)?
8. What is C.3?
9. What are ‘Best Management Practices’ (BMPs)?
10. What is NPDES and who oversees it?
11. What is an NOI and what permits does it cover?
12. What is IPM and what are some ways I can try it?
13. What are Pollutants of Concern (POCs)?