Hazardous Substances

Learn more about harmful substances that can make you and your love ones ill. Many of these substances can be found in the air and building materials of your home.

Page updated on Mar 18, 2019 at 11:45 AM


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Radon is a radioactive gas that you cannot see, taste, or smell. It is the second leading cause of lung cancer. Radon is found in all states and can only be found by testing your home. Radon levels vary from house to house, so do not rely on what your neighbor's test results.

Carbon Monoxide

Carbon monoxide (CO) is a colorless, odorless and poisonous gas that is produced by the incomplete burning of carbon in fuels. When CO enters the bloodstream, it reduces the delivery of oxygen to the body's organs and tissues. Exposure to elevated CO levels can cause impairment of visual perception, manual dexterity, learning ability and performance of complex tasks. Visit www.alexandriava.gov/AirQuality to learn more about CO.


Lead is a soft, dense metal used in the production of many items. Lead is poisonous and can cause severe damage to the brain, nervous system and liver. These effects are devastating to children. In 1978, lead was banned from use in paint, but it can still be found in some older buildings, toys, etc. 


Mold & Moisture