2.5a Pollutant Source Control

Feature	According to the U.S. Green Building Council: Americans spend on average 90% of their time indoors, where levels of pollutants may run two to five times — and occasionally more than 100 times — higher than outdoors, according to the U.S. Environmental Protection Agency. Similarly, the World Health Organization reported in its Air Quality Guidelines for Europe that most of an individual's exposure to many air pollutants comes through inhalation of indoor air. Many of the pollutants found indoors can cause health reactions in the estimated 17 million Americans who suffer from asthma and 40 million who have allergies, contributing to millions of days absent from school and work. Homeowners are just beginning to realize the link between their health and their homes. (Above: During a remodel, the Doering family of Santa Barbara used nontoxic paints and finishes in order to provide cleaner air for their newborn son, and had their cabinets made with formaldehyde-free materials.)
Indoor Pollutants	Hazardous household pollutants may include carbon monoxide, radon, formaldehyde, mold, dirt and dust, pet dander, and residue from tobacco smoke and candles. Many homeowners also store various chemicals inside their homes as well, including pesticides, fertilizers, solvents, grease, oils, degreasers, gasoline, antifreeze, strong detergents, thinners and oil-based paints. From the American Lung Association: These are common sources of indoor air pollution: • Asbestos • Biological Pollutants • Carbon Monoxide • Carbon Monoxide Fact Sheet • Formaldehyde • Indoor Air Pollution Fact Sheet • Lead • Pesticides • Radon • Radon Fact Sheet • Secondhand Smoke • Secondhand Smoke Fact Sheet
Low VOC Paints	According to the NAHB Research Center: Not so long ago, it was common for fumes to drive people from their homes during repainting. Most conventional paints contained high levels of VOCs (volatile organic compounds) that produced a breathable gas when applied. The VOCs diminish air quality, and may be detrimental to your health. Today, alternative manufacturing techniques have allowed the development of low- and no-VOC paints that release no, or minimal VOC pollutants, and are virtually odor free. Low- and no-VOC paints typically cost about the same as a manufacturer's premium line of paints.
Resources	LEED for Homes Indoor Environmental Quality point system EPA’s Guide to Indoor Air Quality