“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.” You can view information here on environmental conditions and health conditions by location. The data can be displayed in tables, graphs or maps, and covers asthma, birth defects, cancer, carbon monoxide poisoning, childhood lead poisoning, heart attacks, and reproductive and birth outcomes. It is available from our Environmental Resources web page at: