This information is available for historical purposes only. For the
most recent emission factors, supported by the EPA, please go to the current
AP 42 web site.
The files are scanned images and have been converted to Acrobat PDF.
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
| First editions, AP 42, US EPA |
Compilation of Air Pollutant Emission Factors,
1968 (PDF 2M)
Environmental Health Series, US Public Health Service |
Compilation of Air Pollutant Emission Factors,
1971 (PDF 8M)
Preliminary Document, US EPA |
Compilation of Air Pollutant Emission Factors,
1972 (PDF 8M)
Revised, US EPA |
| Second edition, AP 42, US EPA |
Compilation of Air Pollutant Emission Factors - Second edition,
1973 (PDF 11M)
|
Compilation of Air Pollutant Emission Factors - Second edition, supplement 1,
July 1973 (PDF 1.3M) |
Compilation of Air Pollutant Emission Factors - Second
edition, supplement 2 ,
September 1973 (PDF
850K) |
Compilation of Air Pollutant Emission Factors - Second
edition, supplement 3,
May 1974 (PDF 3M) |
Compilation of Air Pollutant Emission Factors - Second edition, supplement 4,
January 1975 (PDF
3.5M) |
| Compilation of Air Pollutant Emission Factors - Second
edition with supplements 1-4, 1975 (PDF
17M)
|
Compilation of Air Pollutant Emission Factors - Second
edition, supplement 5,
December 1975 (PDF
8.5M) |
Compilation of Air Pollutant Emission Factors - Second
edition, supplement 6,
April 1976 (PDF
3M) |
Compilation of Air Pollutant Emission Factors - Second edition, supplement 7,
April 1977 (PDF
5.7M) |
| Third edition, AP 42, US EPA |
Compilation of Air Pollutant Emission Factors - Third edition including supplements 1- 7 from second edition,
1977 (PDF
26M)
|
Compilation of Air Pollutant Emission Factors - Third edition, supplement 8,
1978 (PDF 6M) |
Compilation of Air Pollutant Emission Factors - Third edition, supplement 9,
1979 (PDF 5M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 10,
February 1980
(PDF 5.5M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 11,
October 1980 (PDF
4.5M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 12,
1981 (PDF
5M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 13,
1982 (PDF
4M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 14,
1983 (PDF
8M) |
Compilation of Air Pollutant Emission Factors - Third
edition, supplement 15,
1984 (PDF
3M) |
Compilation of Air Pollutant Emission Factors - Third
edition, Update package,
1985 (PDF
5M) |
| Fourth edition, Volume I: Stationary Point and Area
Sources, AP 42, US EPA |
Compilation of Air Pollutant Emission Factors, -
Fourth Edition,
1985 (PDF
27M) |
Compilation of Air Pollutant Emission Factors - Fourth Edition, supplement A,
1986 (PDF
13M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, supplement B,
1988 (PDF
6M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, supplement C,
1990 (PDF
5M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, supplement D,
1991 (PDF
5M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, supplement E,
1992 (PDF
8M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, supplement F,
1993 (PDF
22M) |
Compilation of Air Pollutant Emission Factors - Fourth
Edition, with supplements A through F incorporated,
(1985 to 1993) (PDF
58M)
|
Fifth edition, Volume I: Stationary Point and Area
Sources, AP 42, US EPA
*Most sections in the 5th edition have been updated. The most recent supplements are available on the the AP42 webpage. |
Compilation of Air Pollutant Emission Factors, -
Fifth Edition,
1995 (PDF
94M)
|
