A watershed is an area of land than drains to a particular waterway, be it a creek, stream, bay, or
ocean. Your neighborhood, school and workplace are all part of a watershed; the roads we drive on and the parks we play in are also part of a watershed. In urban settings water travels more quickly across pavement than in a natural setting. Most of the stormwater runoff in San Mateo County eventually drains into the San Francisco Bay or the Pacific Ocean.

San Mateo County has 34 watersheds. Find the watershed you live in:

San Mateo County Watershed Studies