Household Hazardous Waste Program

Collection Schedule
The HHW Collection Facility is open year-round every Thursday, Friday and Saturday at the San Mateo facility (except major holiday weekends). Additional collections are held in several other locations throughout the county. Make an appointment for any collection that is most convenient for you. This drop-off disposal service is for residential household hazardous waste from county residents.

Wastes Accepted

  • Paint, paint thinner, varnish, and stain;
  • Garden, swimming pool, and hobby chemicals;
  • Household cleaning products and aerosol spray cans;
  • Fluorescent tubes, propane tanks, and automotive products (gasoline);
  • Thermometers and other mercury wastes;
If you only have Latex paint, antifreeze, motor oil, oil filters, automotive batteries, household batteries, or fluorescent tubes, you can check our list of collection centers for a location nearest you.

Residential fire extinguishers may be discharged into the regular trash, and then recycled as a plastic or metal container, or you may bring them into the program by appointment for recycling.

Wastes Not Accepted

  • Asbestos*
  • Appliances*
  • Business wastes*
  • Construction wastes*
  • Compressed Gas Cylinders (except propane up to 5 gallons in size)
  • Explosives/Ammunition/Fireworks
  • Tires
  • Any waste in a container larger than five (5) gallons.
*For information on reuse or recycling of these items please visit RecycleWorks for information.
For disposal of all other items please contact our office at (650) 372-6200.

Medical Waste Disposal Information
Business Waste

See our Very Small Quantity Generator (VSQG) Business Collection Program.


Contact us at or call (650) 372-6200.

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