Subject matter experts systematically reviewed evidence on the effectiveness of housing interventions
that affect health outcomes associated with exposure to chemical agents, such as pesticides, lead, volatile organic compounds, as well as the radon gas. Particulates were also examined, and the role of ventilation on exposures was assessed.
Structural deficiencies, pest infestations, gas stoves, and introduction of source materials that off-gas or otherwise release toxic agents are all housing factors that can increase the presence of chemical agents in or around a dwelling. Because most homes in the United States do not have a planned supply of fresh air delivered to the building space and, instead, rely on operation of windows and intermittent or inadequate building leakage, indoor airborne contaminants can increase. The absence of easily cleanable surfaces can also contribute to increases in pesticide residues, lead-contaminated house dust, and other accumulated toxicants.