Investigate the problem icon
Step 1: Investigate the problem

Identify and prioritize pollution sources

Information on pollution sources and emissions comes from several types of data, including self‑reported data, continuous monitors and satellite observations. Modeling tools, such as the EPA’s MOVES model, are another powerful tool that your city can tap into to estimate or even predict pollution from specific activities, such as transportation or energy generation.

Together, these tools help cities identify where pollution is coming from, how much is released and which sources contribute most to poor air quality. They provide the insights that cities need to make the case for new policies and to focus resources where they will have the greatest impact. Check out our curated list of featured tools below to begin identifying your city’s top pollution sources.

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Source and emissions information

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Tool

CA Mobile Source Emissions Inventory Modeling Tools

CARB’s MSEI (Mobile Source Emissions Inventory) Modeling Tools page is a hub for California’s official mobile?source emissions models—including EMFAC (on?road vehicles), OFFROAD (off?road equipment), and related...
Analysis Model Tool

HARP Air Dispersion Modeling and Risk Tool

The HARP Air Dispersion Modeling and Risk Tool, developed by the California Air Resources Board, is Windows-based software that allows users to run air dispersion models...
Model

CACES

The CACES data portal provides publicly available, high?resolution estimates of air pollution exposures and related metrics developed by the Center for Air, Climate, and Energy Solutions....
Tool

California Emissions Estimator Model

CalEEMod (California Emissions Estimator Model) is a free, statewide land use emissions calculator used to estimate air pollutant and greenhouse gas emissions from development projects in...
Map

Utah Environmental Interactive Map

Interactive map that displays information on air quality monitoring, locations of oil and gas wells, ozone and PM2.5 nonattainment areas, permitting and compliance for NSR and...

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