Following is a list of freeware that provides tools for investigating and cleaning up air pollution. Before you access any software or apps, please read our disclaimer and permissions page if you haven't already done so.

AERMAP
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). A terrain preprocessor for AERMOD. AERMAP processes commercially available Digital Elevation Data and creates a file suitable for use within an AERMOD control file. This file would contain elevation and hill-height scaling factors for each receptor in the air dispersion study.

AirCompare
By Cross-Agency U.S. Government. How does the air quality in my city compare with other cities? What time of year has the best air quality? Has the air quality in my city improved? AirCompare provides local air quality information to help you make informed, health-protective decisions about moving or vacationing.

AIRNow Mobile App
By US Environmental Protection Agency. The AIRNow mobile application provides real-time air quality information that you can use to protect your health when planning your day. You can get location-specific reports on current air quality and air quality forecasts for both ozone and fine particle pollution (PM2.5). Air quality maps from the AIRNow website provide visual depictions of current and forecast air quality nationwide, and a page on air quality-related health effects explains what actions people can take to protect their health at different AQI levels, such as "code orange." Available for iPhone and Android.

AQI Calculator: AQI to Concentration
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Select a criteria pollutant and enter the Air Quality Index (AQI); the associated pollutant concentration and health information are indicated.

AQI Calculator: Concentration to AQI
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Select a criteria pollutant and enter the pollutant concentration in the specified units; the Air Quality Index and associated information are calculated.

Atmospheric Properties Calculator
By The JavaScript Source. Input altitude, speed, and reference length and this online calculator will estimate temperature, density, pressure, speed of sound, viscosity, Reynolds Number, and more.

Bioassay Quick Reference Table
By California Department of Toxic Substances Control. This guide is the prototype of a project aimed at creating an index of all the standard bioassays currently being used in the scientific community. Initially includes ASTM standards.

BlueSky
By US Department of Agriculture, Forest Service. A modeling framework designed to predict cumulative impacts of smoke from forest, agricultural, and range fires. The BlueSky smoke modeling framework combines emissions, meteorology, and dispersion models to generate predictions of smoke impacts across the landscape.

BPIP
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Building Profile Input Program (BPIP) is a PC-based program designed to incorporate the concepts and procedures expressed in the Good Engineering Practice (GEP) technical support document, building downwash guidance, and other related references that correctly calculate building heights (bh) and projected building widths (pbw) for simple, multi-tiered, and groups of structures.

BPIPPRM
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Building Profile Input Program for PRIME (BPIPPRM) is the same as BPIP but includes an algorithm for calculating downwash values for input into the PRIME algorithm which is contained in such models as AERMOD.

CAIT Climate Data Explorer
By World Resources Institute. Provides access to comparable greenhouse gas emissions data sets, as well as other climate-relevant indicators, to enable analysis on a wide range of climate-related data questions in climate change policymaking.

CALMPRO
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Calms Processor (CALMPRO) is a meteorological processor which provides consistent application of handling calms by setting the wind direction of the calm hour to the last reported wind direction and the wind speed to 1 m/s.

CHAVG
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). A post-processor program for computing running averages (averages that begin each hour and overlap) and end-to-end averages (averages that do not overlap) from hourly concentrations files.

CONSUME
By US Department of Agriculture, Forest Service. Input fuel characteristics, lighting patterns, fuel conditions, and meteorological attributes, then CONSUME outputs fuel consumption and emissions by combustion phase. CONSUME is designed to import data directly from the Fuel Characteristic Classification System (FCCS), and the output is formatted to feed other models and provide usable outputs for burn plan preparation and smoke management requirements.

CT-EMFAC
By California Department of Transportation. Caltrans' version of the California Air Resources Board's EMissionFACtors7F program for calculating composite on-road emission factors. This is for use in California only instead of MOBILE5

EMS-HAP
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). The Emissions Modeling System for Hazardous Pollutants (EMS-HAP) is an emissions processor that performs the steps needed to process an emission inventory for input into the ASPEN model or the ISCST3 model. EMS-HAP is written in the SAS programming language and is designed to run on any UNIX workstation. The user will need a SAS license and some knowledge of SAS to use this program.

Fire Emission Production Simulator (FEPS)
By US Department of Agriculture, Forest Service. Manages data concerning consumption, emissions and heat release characteristics of prescribed burns and wildland fires.

Global Emission Model for Integrated Systems (GEMIS)
By Institute for Applied Ecology e.V.. A life-cycle analysis (LCA) model, LCA database, and cost-emission analysis system. GEMIS evaluates environmental impacts of energy, material and transport systems, i.e. air emissions, greenhouse gases, solid/liquid wastes, and land use. Also GEMIS can determine the economic costs of scenario options. Old version available.

Landfill Gas Emissions Model (LandGEM)
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). Estimates emission rates for methane, carbon dioxide, nonmethane organic compounds, and individual toxic air pollutants from landfills. The program can also be used by landfill owners and operators to determine if a landfill is subject to the control requirements of the federal New Source Performance Standard (NSPS) for new municipal solid waste (MSW) landfills (40 CFR 60 Subpart WWW) or the emission guidelines for existing MSW landfills (40 CFR 60 Subpart Cc).

PM Calc
By US Environmental Protection Agency. Calculates controlled emissions for PM2.5 and PM10 for each point source; requires the user to input uncontrolled emissions (either total particulate or PM10) for each source, the source category classification (SCC) and the control device, if any.

Pressure Units Converter
By The JavaScript Source. Use this online calculator to convert from one unit of pressure to another, including lbs/sq inch, atmospheres, inches Hg, inches H2O, and others.

SPECIATE
By US Environmental Protection Agency. SPECIATE is the EPA's repository of total organic compound (TOC) and particulate matter (PM) speciation profiles of air pollution sources. It includes more than 4,000 PM and TOC profiles.

TANKS (Windows)
By US Environmental Protection Agency. Estimates volatile organic compound (VOC) and hazardous air pollutant (HAP) emissions from fixed- and floating-roof storage tanks. TANKS is based on the emission estimation procedures from Chapter 7 of EPA's Compilation Of Air Pollutant Emission Factors (AP-42). Source code and earlier versions are available.

WebFIRE
By US Environmental Protection Agency, Office of Air Quality Planning and Standards (OAQPS). This Internet version of FIRE provides access to the Agency’s air emissions factors information.

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This page last updated on 9/29/16