National Environmental Public Health Tracking Network
The National Environmental Public Health Tracking Network is a system of integrated health, exposure, and hazard information and data from a variety of national, state, and city sources. CDC provides funds to 23 state and local health departments to develop local tracking networks that feed into the national tracking network.
http://ephtracking.cdc.gov/showHome.action and related web pages. Accessed August 28, 2010.