If an extinguisher is empty, you can simply throw them out with your recycling trash since they no longer contain hazardous materials. You may want to still check with your local recycling company about the best way to recycle the canister. Call fire department if fully/partially charged. Some local fire departments accept portable fire extinguisher drop-offs. Call ahead of time …
Dispose of old fire extinguishers at your local household hazardous waste facility.
Fire Extinguisher Disposal or Recycling – First Alert
In some areas of the US, fire extinguisher recycling is a good option. Although you can’t place an extinguisher in a regular household recycle bin, you can take it to a fire extinguisher service company or recycling facility. Check your local fire extinguisher company listings or earth911.com to find a recycling facility near you. If recycling isn’t a possibility, it is also …
Instead the disposal depends on the condition of the fire extinguisher. If it still has charge , the local fire protection professional should be able to help dispose of it in an appropriate manner. If it is empty , the local recycling facility will provide directions for recycling the steel canister.
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Disposal Process for Used, Expired Fire Extinguishers Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher