Monitor Values Report - Hazardous Air Pollutants
This report displays hazardous air pollutant summary data for individual monitoring sites. Read more about what's in this report.
Note: This report uses data from AQS. EPA also maintains a separate database of air toxics monitored data, the Ambient Monitoring Archive, which consists of data from AQS and other monitoring networks not reporting to AQS. A more complete description of the sources of the data and the quality assurance procedures applied to the data is available at http://www.epa.gov/ttn/amtic/files/toxdata/techmemo20131029.pdf. The data archive is typically updated on an annual basis.