What is NPDES and who oversees it?

NPDES stands for the National Pollutant Discharge Elimination System. It’s a permitting program required under the U.S. Clean Water Act for discharges to surface waters of the U.S. In CA, USEPA has delegated its authority to implement the NPDES Program to CAL/EPA’s State Water Resources Control Board (SWRCB) who in turn manages the NPDES Program via five Regional Water Quality Control Boards (RWQCBs). In Contra Costa County, two RWCQBs oversee our County’s discharges to the Bay and the Delta, the San Francisco Bay and Central Valley RWCQBs, respectively.

Show All Answers

1. How do I calculate the Flood Control flow data point? Do I need to know the post development design flows for my project?
2. How do I determine the 25-year 24-hour storm depth
3. What are Pollutants of Concern (POCs)?
4. What are Stormwater Best Management Practices (BMPs)?
5. What is a Watershed?
6. What is an illicit discharge and who do I call to report it?
7. What is an NOI and what permits does it cover?
8. What is C.3?
9. What is NPDES and who oversees it?
10. What is the design storm for my project?
11. What is the difference between a Stormwater Pollution Prevention Plan (SWPPP) and a Stormwater Control Plan (SWCP)?
12. What is the difference between point source and non-point source?
13. What is the difference between the County Watershed Program and the Contra Costa Clean Water Program?
14. What is the difference between the storm drain system and the sanitary sewer?
15. What is the drainage easement across my property? Can I build on it? What can I do on it?
16. Who do I contact if I have flooding on my street?