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 California Code of Regulations (Last Updated: August 6, 2014)
 Title 13. Motor Vehicles
 Division 3. Air Resources Board
 Chapter 1. Motor Vehicle Pollution Control Devices
 Article 4.5.
 Appendix A.

  Appendix A.  

Table A-1
PM Emissions Factors by Engine Model Year (g/mile)
Engine Certification
Medium Heavy-Duty
Heavy Heavy-Duty
Standard Model Year
Diesel Vehicle (MHD)
Diesel Vehicle (HHD)
Pre-1991
1.65
3.36
1991-1993
0.84
1.25
1994-2006
0.43
0.81
2007-2009*
0.06
0.11
2010 and newer*
0.06
0.11
* If the engine is not equipped by the manufacturer with a diesel particulate filter, use the emission factor for the 1994-2006 model years
Table A-2
NOx Emissions Factors by Engine Model Year (g/mile)
Engine Certification
Medium Heavy-Duty
Heavy Heavy-Duty
Standard Model Year
Diesel Vehicle (MHD)
Diesel Vehicle (HHD)
2003 and older
14.2
22.0
2004-2006
6.7
12.0
2007-2009
4.0
7.0
2010 and newer
0.8
1.6