The indoor environmental quality (IEQ) of a hospital, school, business, or any type of building can be negatively impacted by numerous biological pollutants. Some of the more common ones listed by the U.S. Environmental Protection Agency (EPA) include bacteria, mold, viruses, animal dander and cat saliva, dust, dust mites, cockroaches, and pollen. EPA goes on to share: There are many sources of these pollutants. Pollens originate from plants; viruses are transmitted by people and ani...