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New Jersey Air Emission Inventories

An air emission inventory is a compilation of air pollutant emissions from sources of anthropogenic (human-made) and biogenic (naturally occurring) sources.  The sources are divided into five sectors, each making up one component of the inventory:  point sources (large stationary), area sources (small stationary), onroad mobile sources, nonroad mobile sources and biogenic (naturally occurring).  New Jersey’s Bureau of Evaluation and Planning estimates and compiles inventories that consist of actual and projected (future estimated) air emissions for the following criteria pollutants:  volatile organic compounds (VOC), nitrogen oxides (NOx), carbon monoxide (CO), particulate matter (fine PM2.5 and course PM10), sulfur dioxide (SO2), and ammonia (NH3).  A summary of those emissions is presented below.  Additional information on emission inventories, including hazardous air pollutants, can be found on USEPA’s website at:  https://www.epa.gov/air-emissions-inventories.




The following charts show the estimated contribution from each anthropogenic air emission inventory sector, for six of the criteria pollutants in the New Jersey 2017 projection inventory.


 


The following charts show the New Jersey estimated anthropogenic air emission trends from 2002 to 2017 for six of the criteria pollutants.

 

Notes:

1.  More information on New Jersey’s 2017 projection inventory can be found in the “NJDEP State Implementation Plan (SIP) Revision for the Attainment and Maintenance of the 75 ppb and 84 ppb Ozone National Ambient Air Quality Standards, Ozone Attainment Demonstration and Nonattainment New Source Review (NNSR) Program Compliance Certification, dated December 22, 2017” located at http://www.state.nj.us/dep/baqp/ozoneppb.html, with the following exceptions:  1. Offsets were included in the 2017 modeling inventory, but are not included in the inventory graphs above;  2.  Stage II or Phase II vehicle refueling emissions have been updated since the SIP;  3.  PM2.5 area source fugitive emissions are pre-adjustment in the 2017 modeling inventory, and are shown post-adjustment in the graphs above;  4.  Wildfires and prescribed burning are not included in the graphs above.

2.  Trends also reflect changes in emission estimation methodologies and models, which sometimes result in higher emission estimates and will appear to be shown as an emission increase.