Topic: Air emissions data
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 and calculate associated health risks from toxic air pollutants. Used primarily in the state’s Hot Spots Analysis & Reporting Program, it integrates modeled concentration outputs with built?in health effect values and demographic data (including a dedicated census database and health database) to support standardized health risk assessments for stationary emission sources in California.
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. It offers gridded and geographically linked datasets (e.g., by census tract, county, or other units) for pollutants like fine particulate matter (PM?.?), ozone, and nitrogen dioxide over multiple years, along with documentation and code. Researchers, agencies, and advocates can download these modeled exposure surfaces to analyze trends, assess health and equity impacts, and link air quality estimates to demographic, health, and policy data.
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 California. It allows planners, consultants, and agencies to input project characteristics (like land use type, size, construction schedule, and operations) and then uses built?in emission factors and default assumptions to quantify construction and operational emissions (e.g., vehicle trips, energy use, area sources). The tool supports CEQA review, air district permitting, and project comparison by providing standardized, transparent emission estimates for proposed developments.
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 Title V permits, and point source emissions.
Mapping tool to view regulated facilities, including for Title V permits, minor permits, and area sources.
Web map providing information on health risks from petrochemical air pollution, chemicals and companies driving those risks, where facilities releasing toxic chemicals are located, and where air quality monitors measure this pollution. The map also displays other drivers of risk, like pollution from other sources.
The DEQ North Carolina Community Mapping System is an online, interactive mapping platform that brings together environmental, health, demographic, and infrastructure data to help communities understand local conditions and support environmental justice and planning efforts. Through a web map interface, users can explore layers related to air and water quality, regulated facilities, climate and flooding risks, sensitive receptors (like schools), and community characteristics, allowing residents, advocates, and decision?makers to identify overburdened areas, visualize cumulative impacts, and inform permitting, enforcement, and investment decisions.
Website providing access to emissions and operating data from power plants.
The ECHO-AIR website documents an open-source modeling tool that converts changes in emissions into estimates of PM2.5 concentration and health impacts using the InMAP Source Receptor Matrix. Developed initially for California, it provides code, setup instructions, and methodological details for running scenario analyses that quantify how incremental emission changes affect population exposure and excess mortality, with an emphasis on environmental justice and climate policy evaluation.
EPA’s Community Multiscale Air Quality (CMAQ) modeling system is an open-source, regional air quality model used to simulate how pollutants such as ozone, PM2.5, and air toxics form and move in the atmosphere. It combines detailed atmospheric chemistry, emissions, and meteorology to estimate pollutant concentrations and deposition over time and space. The CMAQ website provides the model code, documentation, tutorials, input datasets, and example applications, supporting researchers and agencies in evaluating air quality policies, health and ecosystem impacts, and interactions between air quality and climate.
