San Mateo County Watershed Map

A watershed is an area of land that 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.

Find more detailed electronic versions of watershed maps with information about the municipal seperate storm sewer systems through the Oakland Museum of California:
(1) Upper Peninsula Watershed Finder and (2)Lower Peninsula Watershed Finder
Hard copies of the watersheds in San Mateo County are available for purchase through the Oakland Museum of California. Three maps cover the County, and include: "Creek & Watershed Map of Daly City & Vicinity", "Creek & Watershed Map of San Mateo & Vicinity," and "Creek & Watershed Map of Palo Alto & Vicinity."

More information about watersheds:
San Mateo County Watershed Studies
California Watershed Portal 
Surf Your Watershed - USEPA information for San Mateo County watersheds including: citizen-based groups at work in these watersheds, water quality monitoring data, assessments of watershed health, and United States Geological Survey (USGS) information.
Citizen Watershed Monitoring Network On the first weekend in May, volunteers from San Mateo County to San Luis Obispo County participate in the Annual Snapshot Day Event.
The San Francisco Bay Area EcoAtlas provides public access to a large collection of objective scientific data and information about the San Francisco Estuary and its watersheds.

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