Attention! This site will be undergoing maintenance on 4/19/2015 at 8:00pm.  The site will be unavailable at that time and is scheduled to be back up by 9:00pm.

Fate, Exposure, and Risk Analysis (FERA)

The tools found on this website, which include EPA's Total Risk Integrated Methodology, will assist with the Environmental Protection Agency's efforts to evaluate the health risks and environmental effects associated with exposure to "criteria" (six common air pollutants including ozone and particles) and toxic air pollutants.

For information on new files, models, etc., please see "Recent Additions."

Total Risk Integrated Methodology (TRIM)

Multimedia Fate and Transport Modeling