Air Quality Measures on the National Environmental Health Tracking Network

The dataset provides air quality measures, including ozone and particulate matter (PM2.5), on the National Environmental Health Tracking Network from 1999 to 2011. It includes data for each county in the United States, identified by state and county FIPS codes. The data is updated yearly and encompasses various measures such as average, count, and prevalence, captured at the county level. The dataset is crucial for understanding air pollution trends and assessing public health impacts.