How do I dispose of an old / used smoke alarm?
Smoke alarms can be disposed of in the regular household garbage as none of the components are recyclable. There is also no environmental concern for the small amount of radioactive material used in many smoke alarms going in to landfill and we have been assured of this from several sources.
Portable fire extinguishers should be disposed of differently. They normally have pressure stored inside so they should not go in the garbage. Most fire extinguisher service companies (which can be found in the yellow pages under fire extinguishers) will dispose of old extinguishers from residents, especially if the resident considers purchasing a new one from the company. The other option is to contact the household hazardous waste depot at the regional land fill site to see if they accept them.
I hope this answers your questions Marc. If you require further information, please feel free to call.