Hazardous Waste

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Proper disposal of hazardous waste is important to maintaining our healthy environment.  Many common products that we use in our daily lives contain potentially hazardous ingredients and require special care when being disposed of. It is illegal to dispose of hazardous waste in the garbage, down storm drains or onto the ground. Chemicals in illegally or improperly disposed of hazardous waste can be released into the environment and contaminate our air, water, and possibly the food we eat.

Residential Services

Residents of the City of San Luis Obispo can bring their household generated hazardous waste to the HHW facility at the Cold Canyon Landfill.  This facility can accept up to 15 gallons or 125 pounds of hazardous waste per trip from residents of the City of San Luis Obispo.


Retail Take Back Program

The County of San Luis Obispo also has a number of “Take Back” programs in place where retailers that sell certain items are required to take them back to ensure proper disposal.  These items include:

  • Household Batteries
  • Fluorescent tubes and bulbs
  • Rechargeable batteries
  • Medicines and Prescription Drugs
  • Paint

For more information how to dispose of household hazardous waste visit

Electronic Waste

Never throw electronic waste into the trash. Many of the components contain toxic chemicals that when not properly disposed of could be released into the environment. Chemicals like brominated flame retardants, mercury, cadmium, and lead are often contained in electronics and can pollute our watersheds and cause irreversible harm to our environment.  For proper disposal information for electronic waste please visit

Programs For Businesses

A local business may qualify for the small quantity generator program from the SLO County Integrated Waste Management Authority.   Under this program, a qualifying business can make an appointment to bring its hazardous waste to HHW facility and dispose of limited quantities of hazardous waste.  For more information about this program visit the SLO County IWMA website at or call the IWMA at 782-8530.