The table below shows aggregate annual carbon dioxide (CO2) emissions (expressed in short tons) emitted from all electric generating units in Massachusetts subject to the Regional Greenhouse Gas Initiative (RGGI), as reported in the CO2 Allowance Tracking System (COATS).   
Total CO2 Emissions Subject to
RGGI Allowance Obligations
YearShort Tons
200918,661,076
201019,804,384
201115,634,872
201213,218,481
201313,677,273
201411,793,969

Emissions data for electric generating units subject to RGGI between 2009 and the present is available through Public Reports on COATS, which you may use to view, customize and download reports of RGGI program data and CO2 allowance market activity. 

For statewide, facility and/or unit level emissions reports, see: RGGI COATS Data
For earlier data, see: Historical Emissions (2000-2008)