Skip to main content

Business Hazardous Waste

HWMA's Household Hazardous Waste (HHW) program is open to businesses that are small quantity generators. 'Businesses' include landlords, nonprofits, & churches.

PLEASE NOTE: By law, all businesses must call ahead to make an appointment.

To schedule an appointment call:

Hazardous Waste Hotline:   (707) 441-2005

Appointments may be made Monday through Friday, from 8:00 a.m. to 3:00 p.m. The facility is closed from 12:00 p.m. to 1 p.m. daily.


Do I Qualify?


If you produce 220 pounds or 27 gallons or less of hazardous waste in any month you qualify for this program.

If you produce more than this quantity, you are considered a large quantity generator and must contact a hazardous waste transporter  for proper handling, transport and disposal of your hazardous waste.

5 Gallon Size Container Limit - We can only accept containers that are up to 5 gallons in size. If you current container size is too large, follow these tips:

  • Get containers that are 5-gallons in size, such as a paint bucket with a lid.
  • Transfer waste from your larger container into the smaller one. Use as many smaller containers as needed.


Materials That Are Not Accepted

  • Ammunition
  • Biological Waste 
  • Explosives 
  • Medical Waste 
  • Pharmaceuticals
  • Pressure Treated Wood *
  • Propane Tanks Larger than 1 Qt
  • Radioactive Waste

* Please see Solid Waste disposal