Keep dumpster and trash containers secured at all times. Trash cans should not be placed on the curb until the day of pickup. Until then, all garbage containers should be secured in a well-constructed shed, garage or basement.
Double-bag smelly garbage and regularly clean trash cans with a deodorizer like ammonia to reduce food odors that attract bears.
Consider using ammonia as a cover scent for garbage odor by pouring and leaving a small amount of ammonia in the trash can or by placing ammonia-soaked rags in the garbage can.
If bears are able to get into a shed used for storing garbage, find a more secure location, remove all attractants and spilled garbage, deodorize, then leave shed doors open to prevent property damage. The bear will leave unrewarded and eventually learn that the easy food source is gone.
Bear-proof dumpsters can often be obtained from your local dumpster provider if you are persistent. The most common designs are metal tops that can be secured with chain hooks, or side-access panels that can be closed securely. Plywood covers and the means to stabilize smaller dumpsters are also worth considering.
Learn more about bear-proof dumpsters at Bear-Resistant Trash Container Manufacturers.