A free online supplement to the American Journal of Public Health (AJPH) is a compilation of articles demonstrating the advancement and evolving sophistication of environmental and occupational justice work, and the use of community-based participatory research approaches over the past decade. This edition of the America Journal of Public Health is supported by the U.S. Environmental Protection Agency (EPA), the National Institute of Environmental Health Sciences (NIEHS), and the National Institute for Occupational Safety and Health (NIOSH). The supplement was supported by the three federal partners and the University of Massachusetts Lowell.