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Using Translation

The County of San Mateo has added a translation feature developed by Google Translate to assist web visitors in understanding information on this website in a variety of foreign languages. Please be aware that Google Translate, a free third party service which the County does not control, provides automated computer translations that may not give you an exact translation. The County cannot guarantee the accuracy of translations through Google Translate so translations should not be considered exact and only used as a rough guide. Anyone relying on information obtained from Google Translate does so at his or her own risk. The County disclaims and will not accept any liability for damages or losses of any kind caused by the use of the Google Translate feature.

children learning about watersheds and pollution prevention
KEEPING OUR WATERWAYS CLEAN
Conserving our water resources.

Keeping Our Waterways Clean

Stormwater pollution in San Mateo County is an issue that affects creeks, San Francisco Bay, and the Pacific Ocean. Stormwater is runoff from rain, snowmelt, and irrigation that flows over surfaces like roads and sidewalks without soaking into the ground. Stormwater runoff in San Mateo County enters storm drains and travels underground to local creeks and waterways before eventually reaching the San Francisco Bay or the Pacific Ocean—without being treated at a water treatment facility. 

As a result, pollutants such as trash, oil, soaps, pet waste, sewage, automotive fluids, construction materials, paint, sediment, and even food waste can contaminate our waterways, harming both aquatic and human life. To protect water quality, it is strictly prohibited to dump, spill, or discharge these pollutants into the storm drain system. Preventing stormwater pollution is a shared responsibility, and everyone can take part. 

San Mateo County Watersheds

A watershed is the area of land where all the water drains into a particular creek, bay, or ocean. Everyone lives in a watershed, and activities in this area can impact water and habitat quality for wildlife and people. Pollution in one part of a watershed can affect areas downstream. Human actions—whether positive or negative—can influence the health of a watershed, including the water quality, wildlife, vegetation, and overall quality of life. In San Mateo County, most stormwater runoff eventually travels from storm drains and creeks and flows into the San Francisco Bay or the Pacific Ocean.

Use this map to find out what watershed your home, office, or school is in.

Integrated Pest Management Policy

Integrated Pest Management (IPM) is an ecosystem-based approach aimed at long-term pest prevention through techniques such as biological controls, mechanical controls, cultural controls, and reduced-risk chemicals. Under the San Mateo Countywide Water Pollution Prevention Program Model Integrated Pest Management (IPM) Policy (PDF), pesticides are applied only when necessary with a focus on targeting specific pests while minimizing risks to human health and the environment. This strategy applies to various County-managed properties, including parks, roadsides, and municipal buildings.

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