Exposure to air pollutants, such as particulate matter or volatile organic compounds may result a variety of adverse health effects. The Industrial Waste Air Model (IWAIR) is a screening level model designed to estimate the risks to nearby workers and residents that may result from inhalation of these pollutants. This model is composed of three main components:

1. An emission model to estimate release of volatile constituents;
2. A dispersion model to estimate fate and transport of constituents through the atmosphere and determine ambient air concentrations at specified receptor locations; and
3. A risk model to calculate either the risk to exposed individuals or source constituent concentrations that can be protectively managed in the unit.

The program requires only a limited amount of site-specific information, including geographic location, source characteristics, and receptor information. 

IWAIR can assist facility managers, state and local regulators, engineers, and other stakeholders in evaluating potential inhalation risks from waste management practices. The model may also help to determine whether the reuse of industrial materials is environmentally appropriate.

To install and run IWAIR, download the executable (iwair.exe) file below to your hard drive and double-click. You will be prompted for a directory to which the files should be extracted. Once complete, go to the directory you specified and double-click the setup.exe file.

Model File: 

• Executable IWAIR Files (19 MB)  

Model Documentation: 

• Industrial Waste Air Model User's Guide (PDF)(146 pp, 2 MB)
• Industrial Waste Air Model Technical Background Document (PDF)(246 pp, 4 MB)