| Allergens |
| Animal dander and excreta |
| Domestic animals |
| Rodents |
| Other laboratory animals |
| Cockroach and other insect antigens |
| Dust mite excreta |
| Molds and fungal spores |
| Pollen |
| Gases and "criteria" air pollutants |
| Carbon monoxide |
| Nitrogen dioxide |
| Ozone |
| Particulate matter |
| Sulfur dioxide |
| Volatile organic compounds |
| Formaldehyde |
| Paints and resins |
| Printer and photocopier emissions |
| Solvents |
| Chemicals found in cleaning products |
| Acetic acid |
| Alcohols |
| Ammonia and other solvents |
| Bleach and other alkalis |
| Glutaraldehyde |
| Hydrochloric acid |
| Phosphoric acid |
| Quaternary ammonia compounds |
| Infectious agents and bioaerosols |
| Bacteria and mycobacteria |
| Molds and fungi |
| Viruses |
| Other |
| Carbon monoxide |
| Perfumes |
| Pesticides |
| Relative humidity |
| Secondhand smoke |
| Temperature |
