1910 S. Riverside Drive, Iowa City, IA 52244   Ph: (319) 337-3520 Fax: (319) 338-0157         

Understanding Indoor Air Quality 

Pollutant Problems


All homes, no matter how clean they appear, are contaminated with dirt and dust.
Older homes can be breeding grounds for mold and mildew. 
New, tightly sealed homes trap pollutants and can have higher concentrations of chemicals


Types & Sources of Pollutants 

Pollutants found in the air
 • Pollen
 • Dust mites
 • Dirt
 • Pet and human dander
 • Plants, people and animals

Microscopic pollutants that grow and reproduce in warm, humid environments

 • Viruses
 • Mold spores
 • Fungi

 • Plants, people, and animals
 • Ductwork
 • Humidifier drip pans
 • Shower heads and toilets
 • HVAC Systems that have not been properly maintained
 • Plumbing leaks
 • Dampness in basements, crawl-spaces, attics and bathrooms
Odors/Chemical Vapors

Air Contaminants in the form of gases

 • Pet odors
 • Cooking smells
 • Gasoline fumes
 • Volatile organic compounds (VOC's), such as formaldehyde  and gasoline
 • Carbon Dioxide
 • Carbon Monoxide

 • Cleaning supplies
 • Paints and solvents
 • Perfumes
 • Tobacco smoke
 • Carpeting and upholstery
 • Air fresheners
 • Automotive fuel and supplies
 • Dry-cleaned clothining
 • Stoves, heaters and fireplaces
 • Pesticides and herbicides


Maintaining propoer humidity levels, between 35% and 50%, has a significant impact on overall indoor air quality. 


































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