San Mateo Countywide Water Pollution Prevention Program (SMCWPPP), formerly STOPPP (San Mateo Countywide Stormwater Pollution Prevention Program) is a program that aims to partner with the county's residents and businesses to prevent pollution of our local water bodies; such as creeks, the San Francisco Bay and the Pacific Ocean.

When we use water on our property or when it rains, pesticides, oil and other pollutants wash into our storm drains and into our water bodies.

We have solutions to help control water pollution. These include Best Management practices for residents, businesses, and the community and Integrated Pest Management. We hope this information helps you join our effort to reduce pollution in San Mateo County.

Municipal Regional Stormwater Permit
NPDES Tentative Order

Watershed Protection
Unincorporated
County of San Mateo

SMCWPPP wins Award for
Public Outreach Efforts

C.3 Stormwater Technical Guidance
for implementing post-construction stormwater controls in new development and redevelopment projects

Earth Day Events April 2008

Too Toxic To Trash!

Download the Bay Friendly Gardening Guide