An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Mercury-Containing Devices and Demolition

old-fashioned round thermostat, the kind that contains mercury

Some items inside residential buildings contain mercury, which poses a persistent and toxic human health and environmental threat. These materials should be carefully salvaged for proper recycling to prevent mercury contamination.

In general, mercury-containing items should be isolated, labeled, and taken to a mercury recycler or consolidation site. Mercury should not be removed from items. Fluorescent lamps should not be crushed.