Where to dispose of small propane canisters?

[j-mart77]

you can refill them

Amazon.com: Brass MACCOUPLER EZ Fill Propane Coupler: Patio, Lawn & Garden

[Mussakka]

Well, these aren't empty containers. I've never used them and they still contain propane. They're probably 20 years old. Probably fine, but I just don't feel safe having in the house anymore. Mind you they're SMALL, as in maybe the size of a tall mayonnaise jar, not the bigger containers you use on a gas grill. The hazardous waste sites seem to be the solution. Thanks to all who responded sincerely.

[IamCSpelch]

Propane tanks, even the small campsite-styles, are not recyclable in curbside bins or carts. They often have trace amounts of gas in them, and when compressed will explode. The tanks can be recycled at a scrap metal dealer; however, they might desire to be assured that all the gas has been evacuated from the cylinder.

[toot68]

Townsend Bertram in Carrboro has recycled them in the past, although I'm not sure about full ones.

[Ed_RDNC]

If I had small containers that were not to be reused, I'd make very sure they were empty by discharging them outside for a long time, and then I use a hammer and screwdriver to punch an opening (carefully), into the side so as to leave a big gaping hole, (not a pin-prick).

That way I can toss them in the standard household metal recycling and don't have to be concerned about causing an explosion. It's visibly un-pressurized and empty.

I do this for any pressurized flammable containers. Spray paint, canned-"air", hair spray, etc.
This can be done safely, if you are careful about the emptying, and the hole-punch.