Where It Comes From
Vehicle exhaust, residential wood/coal burning and wildfires; industrial sources (coke ovens, aluminum production); coal-tar/asphalt fumes and sealants; tobacco smoke; charred or smoked foods. [1][2]
How You Are Exposed
Breathing smoke or polluted air; skin contact with soot, used motor oil, coal-tar products, or fresh asphalt; eating heavily charred meats or smoked foods; indoor dust tracked from outdoors. [1][2]
Why It Matters
Causes tumors in animals and damages DNA; major agencies consider it a probable/likely human carcinogen; PAH mixtures also irritate lungs and skin. [1][2][3]
Who Is at Risk
Smokers and people around secondhand smoke; workers in paving/roofing with coal-tar pitch, coke ovens, aluminum smelters, chimney sweeping, firefighting; people near heavy traffic or industrial sites. [1][2]
How to Lower Your Exposure
Don’t smoke; avoid heavy smoke and idling engines; cook without charring (trim fat, bake/steam); wash off soot and change shoes/clothes; avoid coal-tar sealants at home; follow workplace PPE and hygiene rules. [1][2][3]
References
- [1]ATSDR. Toxicological Profile for Polycyclic Aromatic Hydrocarbons (PAHs). 2020.
- [2]IARC Monographs, Vol. 92: Some Non-heterocyclic PAHs and Some Related Exposures. 2010.
- [3]U.S. EPA. IRIS: Dibenzo[a,h]anthracene (CASRN 53-70-3).