There are many sources of air pollutants in the home, including combustion sources such as oil, gas,
coal, wood, and tobacco products; building materials and furniture; new carpeting and vinyl flooring;
cleaning products; personal care products; glues and adhesives; paints and varnishes; and pesticides.
These types of products contain organic chemicals calledVolatile Organic Compounds (VOCs)– volatile because
they “off-gas” into the air.
Other pollutants in the home can come from biological sources, released into the air through air
conditioning and heating systems, humidifiers, leaking pipes, leaking roofs and wet carpets.
Biological, or micro-organism, pollutants include:molds, dusts, pollens, insects, bacteria, and viruses.