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National-Scale Air Toxics Assessment Overview: The 33 Pollutants

Information provided for informational purposes onlyNote: EPA no longer updates this information, but it may be useful as a reference or resource.
AIR POLLUTANTS INCLUDED IN THE ASSESSMENT
1. acetaldehyde 18. formaldehyde
2. acrolein 19. hexachlorobenzene
3. acrylonitrile 20. hydrazine
4. arsenic compounds 21. lead compounds
5. benzene 22. manganese compounds
6. beryllium compounds 23. mercury compounds
7. 1, 3-butadiene 24. methylene chloride
8. cadmium compounds 25. nickel compounds
9. carbon tetrachloride 26. perchloroethylene
10. chloroform 27. polychlorinated biphenyls (PCBs)
11. chromium compounds 28. polycyclic organic matter (POM)*
12. coke oven emissions 29. propylene dichloride
13. 1, 3-dichloropropene 30. quinoline
14. diesel particulate matter 31. 1, 1, 2, 2-tetrachloroethane
15. ethylene dibromide 32. trichloroethylene
16. ethylene dichloride 33. vinyl chloride
17. ethylene oxide
* also represented as 7-PAH
More information about the general sources of the emissions is available.

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