AERMOD is a next-generation dispersion model that includes advanced boundary layer algorithms for modeling the dispersion of point, area, and volume sources. This suite of tools includes AERMET and AERMAP, which are our meteorological and terrain preprocessors, respectively. AERMOD is the preferred dispersion model for regulatory applications.

ISC2 and ISC3 (Industrial Source Complex Models 2 and 3) include algorithms such as area source, open pit, complex terrain, dry and wet deposition for particles, and the CALPUFF dry deposition algorithm for gaseous pollutants.

SCREEN2 and SCREEN3 air quality screening models were developed for the EPA and are widely used to provide simple, conservative concentration estimates based on the ISC2 and ISC3 dispersion algorithms. The SCREEN model is also included in TSCREEN, whichis a toxics screening model with algorithms that estimate emissions and dispersion for Superfund release scenarios.

Air Quick Facts downloads data from national EPA data systems to a PDA/handheld database query application.

i -STEPS infinity ® handles total facility emissions to all media (air, land, and water), pollutant-specific emissions by source or source category, and other facility activities.

NEON (NEI Emissions On the ‘Net) is an EPA web reporting tool for querying the multiyear National Emission Inventory (NEI) and National Toxics Inventory (NTI) data from EPA’s Oracle database.