When is my street swept?
If you live on a publically maintained street in unincorporated Contra Costa County with curb and gutter, your street is swept once per month. Go to the Municipal Maintenance page of CWP’s website to view the County’s street sweeping schedule and confirm that your street is included on our street list. If you have further questions call CWP at (925) 313-2236.

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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)?