HHW Collection Events for Businesses

Services are available for businesses that qualify as Conditionally Exempt Small Quantity Generators per regulations (CCR Title 22 §66260.10), which are businesses that generate 100 kilograms (27 gallons liquid or 220 pounds solid) or less of hazardous waste per month. The Agency offers two options: the Household Hazardous Waste Facility and HHW Collection Events.

For a full list of event locations, visit our calendar.

Collections Process

Every week there is a HHW collection event somewhere in Sonoma County.

Appointment: Appointment required. To make an appointment, download the following forms and fax to (707) 795-2071 or email toxicsdisposal@cleanharbors.com and attach the completed questionnaire and inventory forms. If you have any questions, please call the office at (707) 795-2025, cell phone at (707) 364-6927, or toll-free at (877) 747-1870 option 2. Appointment line staffed M-F from 8am to 2:30pm or leave a message.

Event hours: Tuesdays 4P-8P

Forms & fees: Paperwork required. $25 processing fee plus disposal fees based on type and quantity of waste.

VSQG Questionnaire and Inventory Form Download .pdf fillable form

Types of EPA ID Numbers

California Permanent ID Numbers
Businesses that generate waste on an ongoing basis must have a permanent ID, you must complete the required application, DTSC Form 1358. There is no fee to obtain a permanent ID number. It will take approximately 3 to 5 business days to process your application. Remember, if 5 or more tons of hazardous waste will be generated in a calendar year on your permanent ID number, generator fees may be due. Go to the Board of Equalization website

California Temporary ID Numbers
Temporary ID numbers (90-day numbers) are issued to people or businesses that do not generate hazardous waste on an ongoing basis. Temporary ID numbers must now be obtained online. DTSC no longer issues temporary ID numbers by phone, only online to apply for a temporary ID number. There is no fee to obtain a temporary ID number. If you have any questions, please contact DTSC at (800) 618-6942. When you hear the recorded message, press 1 and then 3 to speak to staff. Remember if 5 or more tons of hazardous waste will be generated in a calendar year on a temporary ID number, generator fees apply.

Required: Obtain a California EPA ID Number

State law requires hazardous waste generators to have an EPA Identification Number. All participants of the Business Hazardous Waste Program MUST HAVE an EPA Identification Number to transport hazardous waste to a Community HHW Collection Events for disposal. If all you have is latex paint and/or Universal Waste (Fluorescent tubes/bulbs and other mercury-containing lamps, household batteries, rechargeable batteries, button batteries, thermostats, thermometers, non-empty aerosol cans) you do not need an EPA ID number.

Common questions and answers

Q. What is the process?

A. 1. Download Business Hazardous Waste Disposal Forms from this website.
2. Obtain an EPA Waste ID number (if needed).
3. Submit paperwork by fax or email to receive an appointment and pricing information.

Q. Will this program meet the disposal requirements of regulating agencies?
A. You will receive a receipt of disposal for your records that will satisfy regulatory disposal requirements. Receipts and all records should be kept for a minimum of three years.

Q. If my business generates more than 100 kilograms of one type of waste, but I have only 1 gallon of something else that my regular hauler won’t accept, can I bring it to this program?
A. You must generate less than 100 kilograms of all hazardous wastes to qualify to use this program.

Q. Does using this program mean my business will be inspected for hazardous waste?
A. The Sonoma County Waste Management Agency is not a regulatory agency.

Q. Who are the regulatory agencies for my business?
A. Contact the Certified Unified Program Agency (CUPA) for your area:

Healdsburg (707) 431-3360
Santa Rosa (707) 543-3500
Petaluma (707) 778-4390
All other areas (707) 565-1152

Staff safety during COVID-19

For the safety of our staff, follow COVID-19 rules at collection events:

1. Remain in vehicle at all times. Crack window in order to talk to collection event staff.

2. Place materials in trunk of car, not on seats.

3. Everyone in vehicle must wear a mask that covers their nose and mouth.


April 2024

02 - Petaluma
09 - Santa Rosa, E *FULL*
16 - Forestville
23 - Healdsburg
30 - Larkfield

May 2024

07 - Sebastopol
14 - Santa Rosa, W *FULL*
21 - Cloverdale
28 - Sonoma

June 2024

04 - Rohnert Park
11 - Oakmont
18 - Windsor
25 - Bodega Bay

July 2024

02 - Santa Rosa, E
09 - Cotati
16 - Kenwood
23 - Healdsburg
30 - Monte Rio

August 2024

06 - Petaluma
13 - Santa Rosa, W
20 - Cloverdale
27 - Sonoma

September 2024

03 - Oakmont
10 - Sebastopol
17 - Windsor
24 - Larkfield

October 2024

01 - Guerneville
08 - Kenwood
15 - Santa Rosa, E
22 - Healdsburg
29 - Rohnert Park

November 2024

05 - Santa Rosa, W
12 - Sonoma
19 - Cloverdale
26 - No event

December 2024

03 - Petaluma
10 - Windsor
17 - Oakmont
24 - No event
31 - No event

Events are subject to change due to COVID-19 or natural disasters.


The following resources are provided in English and Spanish language. Click on the image to download the .pdf. Visit Downloads & Graphics to download the complete 24-page 2022-2023 Zero Waste Guide.