| 2005 Portland Air Toxics Study |
| Annual Rotating Study |
| Background site/Sauvie Island |
| Federal Network Air Toxics Sites |
| Hayden Island |
| Inner SE Portland (Metals Only) |
| Lane County (LRAPA) Air Studies |
| Medford Air Studies |
| Multiple Projects |
| NE Portland (Toxics) |
| North Portland (Metals Only) |
| SE Portland (Metals Only) |
| School Air Toxics Study |
| Swan Island |
| The Dalles (PAHs Only) |