The Association of State and Territorial Health Officials (ASTHO) is the national nonprofit organization representing public health agencies in the United States, its territories, and the District of Columbia, and the more than 100,000 public health professionals these agencies employ. ASTHO members, the chief health officials of these jurisdictions, also referred to as state/territorial health officials (S/THOs), formulate and influence sound public health policy and ensure excellence in state-based public health practice. ASTHO’s primary function is to track, evaluate, and advise members on the impact and formation of public or private health policy that may affect them and to provide them with guidance and technical assistance on improving the nation’s health. ASTHO’s Environmental Health (EH) team supports and strengthens state public health’s role in all facets of health protection from environmental health threats by forging sound policymaking through effective communication and coordination, regulation, partnership building, surveillance, and response to improve the collective practice of environmental public health services. These efforts are aimed at ultimately reducing morbidity and mortality associated with environmental health threats in the United States.