Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Median indoor source contributions to HAPs risk from inhalation exposure.
| Indoor source | Percent |
|---|---|
| Acetaldehyde | 15 |
| Formaldehyde | 70 |
| 1,3-Butadiene | 10 |
| Benzene | 20 |
| Chloroform | 70 |
| Methylene chloride | 45 |
| 1,4-Dichlorobenzene | 35 |
| Perchloroethylene | 30 |
| Trichloroethylene | 25 |
| PAH-B2 | 10 |
| PAH-CD | 20 |
| Naphthalene | 60 |
