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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.

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. Learn about the multiple easy and free ways to safely and properly remove HHW from your home here.

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

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