What Sonoma County itself runs: 1 landfill, site or program covering 1 item. If your town doesn’t have its own page, these are usually the places to start.
Checked October 26, 2026 · Call before you go · How we check
Sonoma County Household Hazardous Waste Facility (Zero Waste Sonoma)
Free weekly drop-off of household hazardous waste for Sonoma County residents (bring ID) at the Central Disposal Site, Building 5, 500 Mecham Rd., Petaluma; Thursday–Saturday 7:30 am–2:30 pm, no appointment. Limit 15 gallons of liquid or 125 lbs per vehicle. Free reuse locker and recycled paint.