Puff Air Dispersion Model

Technical Specifications

CALPUFF View is an interface for the CALPUFF modeling system. See below the technical specifications for this model:



Model Name


Model Type

Non-steady state Gaussian Puff model


200-300km from the source

Time Step

1-hour (Version 5.8), Variable down to the second (Version 6 & Version 7)


Elevated, processed by TERREL

Building Downwash

Modeled by BPIP or BPIP-PRIME

Source Types

Point, area, volume, line, flare (V7 only), road (V7 only)


Hourly surface, upper air and precipitation data and/or prognostic data (e.g. MM5 or WRF)

Wind Field

Three dimensional

Release Types

Buoyant or neutrally buoyant plumes

Emission Types

Constant or time-varying, planned or fugitive

Atmospheric Chemistry

MEOPUFF II, RIVAD/ARM3, SOA, Radiological decay, ISORROPIA, and user-specified transformation rates

Regulatory Status

Preferred US EPA regulatory model for long-range and visibility applications.  Also used for complex wind field scenarios

System Requirements

This product is a Microsoft Windows-based program that can be installed in the following Windows operating systems:

  • 32-bit and 64-bit Operating Systems
  • Windows 10
  • Windows 8 & 8.1
  • Windows 7 (Home Premium, Professional, and Ultimate Versions)

Minimum requirements:

  • 2.4GHz processor or faster
  • At least 20 GB of available hard disk space
  • At least 2 GB of RAM