Resource Type: Analysis
EPA’s Human Exposure Model (HEM) is a probabilistic exposure assessment tool used to estimate how people are exposed to contaminants (often air pollutants, but not limited to them) through different pathways and microenvironments. It is designed to support human health risk assessments by translating environmental concentrations into population exposure distributions for specific pollutants, locations, and demographic groups. HEM uses information on contaminant levels, population characteristics, and time–activity patterns to produce quantitative estimates of average and high-end exposures suitable for regulatory analyses and comparative policy evaluations.
Mapping tool that shows estimates of mortality and morbidity impacts from coal fired power plants in the U.S.
Website providing health and environmental data for municipalities in New Jersey
Document describing methods used to evaluate air quality impacts of the Central Business District Tolling Program in New York City.
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.
Report on air pollution impacts from NYC Congestion Relief Zone. Provides data from real-time air quality monitoring inside and outside the zone.
Website providing access to air quality data collected at outdoor monitors across the US. Includes downloadable data files, map of monitor locations, visualization tools, and summary reports.
The toxic flooding vulnerability map is an interactive tool that ranks and visualizes how vulnerable petrochemical facilities and nearby communities in the Galveston Bay region are to toxic flooding. Built from more than 100 indicators across flood risk, chemical transport, facility hazards, ecosystem conditions, baseline health, and social and economic factors, it produces separate vulnerability scores for facilities and for community grid cells. Users—such as planners, engineers, policymakers, and Gulf Coast residents—can explore overall vulnerability, drill down to see which specific indicators drive risk in each location, identify high?priority facilities and neighborhoods, and use downloadable profiles and map layers to help target nature?based solutions that reduce both flooding and chemical exposure.
Mapping tool showing air monitoring locations and the locations that contribute to air quality for a set of large cities in the U.S.
The U.S. Climate Vulnerability Index map is an interactive tool that ranks more than 70,000 U.S. census tracts using 184 indicators to show which communities face the greatest challenges from climate change. It visualizes “overall climate vulnerability” as well as underlying drivers in domains such as health, social and economic conditions, environment, infrastructure, and climate impacts (e.g., extreme events and climate disaster costs). Users can search for any location, compare tracts within a state or EPA region, and drill down to see which specific factors—like housing quality, exposure to pollution, or health burdens—are contributing to vulnerability, helping communities and decision‑makers target climate resilience investments where they are needed most.
