Outdoor Air Quality
Air pollution in the United States is a public health threat affecting potentially millions of people throughout the country. It is associated with increased emergency department visits and hospitals stays for breathing and heart problems, and increases in respiratory illnesses such as asthma, pneumonia, and bronchitis.
Tracking air pollution can help people understand how often they are exposed to unhealthy levels of air pollution. These data can also help public health professionals or policymakers understand which areas may be most in need of prevention and control activities. The Tracking Network includes data about , and fine particulate matter (PM2.5)