Many old thermostats contain mercury about 3 grams of mercury per device. According to the Michigan Department of Environmental Quality, the improper disposal of mercury thermostats results in about 8% of the mercury released annually in the U.S., equal to about 9.6 tons. Make sure you dispose of your old mercury-containing thermostat properly, NOT with regular household trash. Once in the environment, it can transform into methyl mercury, which can be extremely harmful to human health.
Please contact your thermostat manufacturer to determine whether they have a mail-back program, or bring them to the Muskegon County Household Hazardous Waste facility. You can also visit www.co.muskegon.mi.us/hhw for more information and disposal options in Muskegon.