Household Hazardous Waste Events

San Mateo County residents can safely dispose of household hazardous waste (HHW) free of charge at special drop-off collection events four times a year.

Event Details

The collection events take place from 8:30 am to 12:15 pm. To participate, residents must schedule an appointment at San Mateo County's HHW Program or by calling 650-363-4718, select option 3.

Don't Wait for an Event

You do not have to wait for a collection event to dispose of HHW! Residents unable to attend the events can still dispose of HHW for free at San Mateo County's permanent HHW facility, Thursdays through Saturdays (except major holiday weekends). You must make an appointment or call 650-363-4718, select option 3.

Dates for 2023 in Daly City

  • Saturday, March 11
  • Saturday, June 10
  • Saturday, September 9
  • Saturday, December 9 - San Mateo County has cancelled this event.

Accepted Items

Accepted items include:

  • Acids/Bases
  • Aerosol Cans
  • Antifreeze
  • Automotive Supplies (Car Batteries
  • Brake Fluid)
  • Cleaning Products
  • Fertilizers
  • Flammable Liquids
  • Fluorescent Lights (Compact and Tubes)
  • Inks
  • Motor Oil
  • Paint
  • Pesticides
  • Photo Chemicals

No radioactive, explosive, medical, or commercial waste is allowed. All waste collected is reused, recycled, or stabilized for proper disposal to achieve zero waste being landfilled.

Reduce, Reuse & Recycling Guide

Use the Reduce, Reuse, and Recycling Guide for San Mateo County for all of your waste-related questions!