As with all fluorescent lights, CFLs contain about five milligrams or less of mercury. This small amount of mercury helps the CFL create light while using less energy.
Just like paint, batteries, thermostats, and other household items, CFLs should be disposed of safely. The best way to dispose of used CFL bulbs is to recycle them at any Home Depot or Rona. You can also take used CFL bulbs to the household hazardous waste collection depot for free disposal. Information on the depot locations and hours of operation is also available by calling the City of Winnipeg recycling and garbage information line at 986-8888, Code 9811 or contacting 311.