Older Editions of AP 42, Compilation of Air Pollutant Emission Factors - Documents
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- ap42_phs_1968 (PDF)(76 pp, 2 MB)
- ap42_1sted_1971 (PDF)(184 pp, 7 MB)
- ap421sted_1972 (PDF)(170 pp, 9 MB)
- ap42_2nded_orig_april1973 (PDF)(305 pp, 10 MB)
- ap42_2ndsup1_july1973 (PDF)(28 pp, 1 MB)
- ap42_2ndsup2_sept1973 (PDF)(20 pp, 765 K)
- ap42_2ndsup3_may1974 (PDF)(60 pp, 3 MB)
- ap42_2ndsup4_jan1975 (PDF)(75 pp, 3 MB)
- ap42_2nded_withsupps1_4_march1975 (PDF)(390 pp, 14 MB)
- ap42_2ndsup5_dec1975 (PDF)(166 pp, 7 MB)
- ap42_2ndsup6_april1976 (PDF)(62 pp, 3 MB)
- ap42_2ndsup7_april1977 (PDF)(128 pp, 5 MB)
- ap42_3rdsup1_7_aug1977 (PDF)(548 pp, 21 MB)
- ap42_3rdsup8_may1978 (PDF)(116 pp, 5 MB)
- ap42_3rdsup9_july1979 (PDF)(228 pp, 7 MB)
- ap42_3rdsup10_feb1980 (PDF)(162 pp, 6 MB)
- ap42_3rdsup11_oct1980 (PDF)(95 pp, 4 MB)
- ap42_3rdsup12_april1981 (PDF)(184 pp, 6 MB)
- ap42_3rdsup13_aug1982 (PDF)(132 pp, 5 MB)
- ap42_3rdsup14_may1983 (PDF)(182 pp, 7 MB)
- ap42_3rdsup15_jan1984 (PDF)(94 pp, 4 MB)
- ap42_3rdupdatepkg_sept1985 (PDF)(94 pp, 4 MB)
- ap42_4thed_orig (PDF)(874 pp, 29 MB)
- ap42_4thed_suppa_oct1986 (PDF)(484 pp, 14 MB)
- ap42_4thed_suppb_sept1988 (PDF)(188 pp, 7 MB)
- ap42_4thed_suppc_sept1990 (PDF)(161 pp, 6 MB)
- ap42_4thed_suppd_sept1991 (PDF)(144 pp, 6 MB)
- ap42_4thed_suppe_oct1992 (PDF)(281 pp, 9 MB)
- ap42_4thed_suppf_july1993 (PDF)(630 pp, 23 MB)
- ap42_4thed_withsuppsa_f (PDF)(1809 pp, 62 MB)
- ap42_5thed_orig (PDF)(1998 pp, 74 MB)
- suppchga-f (PDF)(3 pp, 152 K)
- suppchg-updates (PDF)(2 pp, 144 K)
- appa (PDF)(32 pp, 90 K)
- appb-1 (PDF)(103 pp, 2 MB)
- appb-2 (PDF)(22 pp, 136 K)
- app-c1 (PDF)(13 pp, 67 K)
- app-c2 (PDF)(9 pp, 44 K)