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Household Hazardous Waste Collection 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. 

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: www.smchealth.org/hhw or by calling (650) 363-4718, select option 3.

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 - Saturdays (except major holiday weekends). You must make an appointment at www.smchealth.org/hhw or by calling (650) 363-4718, select option 3.

*DATES FOR 2020 in Daly City:

  • Saturday, March 14
  • Saturday, June 13
  • Saturday, September 12
  • Saturday, December 12 

*UPDATE: These events have been cancelled due to the current Health Order 

For a full listing of HHW collection events in 2020 in all San Mateo County cities, click here.

To make an appointment, click here.  

Check out our short video to find out what types of items you can bring to the events by clicking the link below:

HHW Video

Accepted items include acids/bases, aerosol cans, automotive supplies (car batteries, motor oil, antifreeze, brake fluid), cleaning products, fertilizers, pesticides, flammable liquids, fluorescent lights (compact and tubes), paint, inks, and 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.


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