Indoor pollution sources that release gases or particles into the air are the primary cause of indoor air quality problems in homes. Inadequate ventilation can increase indoor pollutant levels by not bringing in enough outdoor air to dilute emissions from indoor sources and by not carrying indoor air pollutants out of the home. High temperature and humidity levels can also increase concentrations of some pollutants.

Read more about what steps to take both to reduce the risk from existing sources of indoor air pollution and how to prevent new problems from occurring in EPA's "Care For Your Air: A Guide to Indoor Air Quality".

EPA created the 

Indoor airPLUS Program

 to help builders meet the growing consumer preference for homes with improved indoor air quality and energy efficiency. Forward-thinking builders can distinguish themselves by offering homes that have earned this advanced designation. A home qualifies when verified to meet the Indoor airPLUS

 specifications, by a certified home energy rater. 

Read more about Indoor airPLUS

Radon

 can enter and collect inside homes and other buildings that are not built with radon-resistant techniques. However, 

buildings constructed with radon-resistant techniques

 can ensure lower radon levels, energy efficiency, and a safer home.

• www.epa.gov/radon

• www.epa.gov/radon/rrnc

Remodeling Your Home? Have You Considered Indoor Air Quality?

While remodeling or improving the energy efficiency of your home, steps should be taken to minimize pollution from sources inside the home, either from new materials, or from disturbing materials already in the home. In addition, residents should be alert to signs of inadequate ventilation, such as stuffy air, moisture condensation on cold surfaces, or mold and mildew growth. These issues should be addressed either before or during the remodeling process.