HAZARDOUS AIR POLLUTANT TRENDS
Total Hazardous Air pollutants are reported by large (typically Major) Point sources only as part of annual air source registrations to the state, however this data is not available online or readily to the public. The best indicator of these trends is the trends of TRI/TURI reported chemical releases.
Air Monitoring of selected HAPs:
Actual air monitoring confirms this steady reduction in selected air toxics.
SOURCE: 2004 DEP Air Report found at http://www.mass.gov/dep/air/perfor01.htm
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