Skip to main content Skip to site navigation

Household Hazardous Waste


What is Household Hazardous Waste (HHW)?

HHW is waste from your home that is toxic, corrosive, flammable, or reactive based on its chemical properties. Products such as batteries, paint and paint thinner, pesticides and fertilizers, and poisons are considered hazardous waste. Learn about the multiple easy and free ways to safely remove HHW from your home here, including making an appointment for the next collection event.

Household Hazardous Waste

It’s illegal and unsafe to dump this waste in the trash or down the drain. San Mateo County’s HHW Program helps residents reuse, recycle, or responsibly manage residential hazardous waste for free at local businesses that collect common items such as batteries and fluorescent lights and neighborhood collection events.

If you have questions, contact us at or (650) 372-6200.

HHW Brochures   Español   -   Chinese 中文    -   Tagalog   -  English