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. Author manuscript; available in PMC: 2016 Nov 21.
Published in final edited form as: Res Rep Health Eff Inst. 2012 Dec;(172):5–82.

Table 26.

EPA Screening Values Based on Cancer and Non-cancer Risksa

Compounds /
(CASRNb)		 EPA Screening Values
(µg/m3)		 Hazard Index
Target(s)
Non-cancer Cancer
n-Hexane (110-54-3) 200 — Nervous system
Butadiene (106-99-0) 0.2 0.03 Reproductive system; hematopoietic
  system cancer
Benzene (71-43-2) 3 0.13 Hematopoietic system cancer;
  development; nervous system
Ethylbenzene (100-41-4) 100 — Development; alimentary system
Styrene (100-42-5) 100 — Nervous system
Toluene (108-88-3) 40 — Nervous system; respiratory system;
  development
Xylenes (mixed) (multiple CASRNs) 10 — Nervous system; respiratory system
  development
MTBE (1634-04-4) 300 3.8 Respiratory irritation; nervous system;
  cancer (?)
Acetaldehyde (75-07-0) 0.9 0.45 Respiratory system; cancer
Formaldehyde (50-00-0) 0.98 180 Respiratory system; cancer; eyes
Diesel exhaust particulate (no CASRN) 0.5 — Respiratory system; cancer
a

EPA screening values from February 2006.

b

CASRN indicates the Chemical Abstracts Service Registry Number.