This Comment examines the potential impact of the demise of Chevron deference on the environment and the health of residents of communities disproportionately affected by “cumulative impacts.” It reviews the Chevron deference doctrine and the U.S. Supreme Court’s overturning of that well-established legal precedent, discusses the goal of environmental justice for all communities and how the U.S. Environmental Protection Agency (EPA) has sought to secure that goal in accordance with the environmental laws administered by EPA, and offers some conclusions.