Do not throw expired boat flares in the trash! Call your local fire department or your local U.S. Coast Guard Auxillary. The Coast Guard Auxillary can use these for training purposes. As long as you have 3 unexpired boat flares on your vessel, you can keep the expired ones. Chances are the expired ones will still work. Use them first.
U.S. Coast Guard Auxilliary-Barnegat Light 609-494-2661
Expired boat flares are not accepted at the County's Household Hazardous Waste Events