Environ Health Perspect 115:976-982 (2007). doi:10.1289/ehp.8990 available via <a href="http://dx.doi.org/">http://dx.doi.org/</a> [Online 25 January 2007] Introduction This article examines policy challenges faced by federal and local governments in the United States as they address the adverse health consequences of substandard housing, buildings, and other indoor environments.