Some of our Towns accept these with propane tanks.
There are several types of fire extinguishers, some which contain hazardous chemicals. The following companies can recharge, test and properly dispose of fire extinguishers:
Gorham Fire Appliance Company, 288 Willard St., Quincy, 617-472-5785
R E Lyons and Sons Fire Equipment, 197 VFW Dr., Rockland, 781-878-7599
If you have a red tank containing CO2 (carbon dioxide), you may discharge it outdoors, unscrew and remove the head or drill a hole in the cylinder, and recycle with scrap metal.