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MassDEP Emissions Inventories

The agency prepares inventories on a periodic basis under the federal Clean Air Act and the Massachusetts Global Warming Solutions Act.
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Proposed 2nd Addendum to 2021 Update of Statewide Greenhouse Gas (GHG) Emissions Baseline

2nd Addendum to Statewide GHG Level: Proposed 1990 Baseline Update, June 2022 (PDF 1.04 MB)

Public Comment Period: Closed

Statewide GHG Emissions Level: Proposed 1990 Baseline Update Appendix C (XLSX 962.84 KB)

Addendum to Statewide GHG Level: Proposed 1990 Baseline Update, February 2022 (PDF 1000.59 KB)

Public Comment Period: Closed

Statewide Greenhouse Gas Emissions Level: Proposed 1990 Baseline Update, Including Appendices A & B, May 2021 (PDF 1.42 MB)

Public Comment Period: Closed

Clean Air Act Emissions Inventories

Massachusetts 2011 Periodic Emissions Inventory: Summary (PDF 792.78 KB)
Massachusetts 2011 Periodic Emissions Inventory: Complete (ZIP 38.22 MB)
Massachusetts 2008 Periodic Emissions Inventory: Introduction (PDF 56.81 KB)
Massachusetts 2008 Periodic Emissions Inventory: Data (PDF 137.95 KB)
Massachusetts 2005 Periodic Emissions Inventory: Introduction (PDF 21.72 KB)
Massachusetts 2005 Periodic Emissions Inventory: Data (PDF 62.2 KB)
Massachusetts 2002 Base Year Emissions Inventory (PDF 443.44 KB)
Tables: Massachusetts 2002 Statewide Emissions (PDF 821.65 KB)
Massachusetts 1996 Periodic Emissions Inventories (PDF 243.51 KB)
Tables: Massachusetts 1996 Periodic Emissions Inventories (XLS 145 KB)

Diesel Particulate Matter Inventories

Massachusetts 2016 Diesel Particulate Matter Inventory Report, April 2018 (PDF 9.32 MB)
Massachusetts 2016 Diesel Particulate Matter Inventory Appendices 3-7, April 2018 (XLSX 1.31 MB)
Massachusetts 2016 Diesel Particulate Matter Inventory MOVES Files, April 2018 (ZIP 59.71 MB)
Massachusetts 2002 Diesel Particulate Matter Inventory Report, September 2007 (PDF 517.57 KB)
Massachusetts 2002 Diesel Particulate Matter Inventory Appendices, September 2007 (PDF 1.25 MB)

Greenhouse Gas Baseline, Inventory & Projection

Statewide Greenhouse Gas (GHG) Emissions Baseline & Projection Update (including Appendices A & B) (PDF 456.97 KB)
Appendix C: Massachusetts Annual Greenhouse Gas Emissions Inventory: 1990-2017, with Partial 2018 & 2019 Data (XLSX 803.54 KB)
Appendix D: 2001 Draft Electricity Emissions Factors (Including Imports) (XLS 1.19 MB)
Appendix E: 2002 Draft Electricity Emissions Factors (Including Imports) (XLS 1023.5 KB)
Appendix F: 2003 Emissions from Electricity Consumed in Massachusetts (XLS 1.05 MB)
Appendix G: 2004 Emissions from Electricity Consumed in Massachusetts (XLS 1.04 MB)
Appendix H: 2005 Emissions from Electricity Consumed in Massachusetts (XLS 1.27 MB)
Appendix I: 2006 Emissions from Electricity Consumed in Massachusetts (XLS 1.27 MB)
Appendix J: 2007 Emissions from Electricity Consumed in Massachusetts (XLS 1.27 MB)
Appendix K: 2008 Emissions from Electricity Consumed in Massachusetts (XLS 1.28 MB)
Appendix L: 2009 Emissions from Electricity Consumed in Massachusetts (XLS 1.29 MB)
Appendix M: 2010 Emissions from Electricity Consumed in Massachusetts (XLS 1.3 MB)
Appendix N: 2011 Emissions from Electricity Consumed in Massachusetts (XLS 1.31 MB)
Appendix O: 2012 Emissions from Electricity Consumed in Massachusetts (XLS 1.37 MB)
Appendix P: 2013 Emissions from Electricity Consumed in Massachusetts (XLS 1.41 MB)
Appendix Q: 2014 Emissions from Electricity Consumed in Massachusetts (XLS 1.38 MB)
Appendix R: 2015 Emissions from Electricity Consumed in Massachusetts (XLS 1.45 MB)
Appendix S: 2016 Emissions from Electricity Consumed in Massachusetts (XLS 1.49 MB)
Appendix T: 2017 Emissions from Electricity Consumed in Massachusetts (XLS 1.74 MB)
Appendix U: 2018 Emissions from Electricity Consumed in Massachusetts (XLSX 850.92 KB)
Appendix V: 2019 Emissions from Electricity Consumed in Massachusetts (XLSX 882.84 KB)
Response to Comments on Statewide GHG Emissions Baseline & Projection Update (PDF 160.73 KB)
Statewide Greenhouse Gas Emissions Level: 1990 Baseline & 2020 Business As Usual Projection (PDF 543.4 KB)
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