This layer displays the amount of toxic releases based on the Environmental Protection Agency (EPA) Toxics Release Inventory (TRI), a national program which tracks the management of over 650 toxic chemicals that pose a threat to human health and the environment. Facilities must report how each chemical is managed through recycling, energy recovery, treatment, and releases to the environment. A “release” of a chemical means that it is emitted to the air or water, or placed in some type of land disposal. The information submitted by facilities to the EPA and states is compiled annually as the Toxics Release Inventory or TRI, and is stored in a publicly accessible database ( Envirofacts. For more information, please visit the EPA Toxics Release Inventory web page.
National Risk Index
The National Risk Index (NRI) is a dataset and an application that help identify communities most at-risk for natural hazards. The NRI leverages available source data for 18 natural hazards, social vulnerability, and community resilience to develop a baseline relative risk measurement for each United Statescounty and Census tract. The NRI is intended to help users better understand the natural hazard risk of their communities or assigned areas.
Air Toxics – Cancer Risk by Census Tract
Layer displays the modeled cancer risk associated with air toxics exposure. Figures represents the likelihood of hazardous exposure per 1 million population.
Air Toxics – Non-Cancer Risk by Census Tract
Layer displays the modeled non-cancer risk associated with air toxics exposure. A hazard index (HI) of 1 or lower means air toxics are unlikely to cause adverse noncancer health effects over a lifetime of exposure.
Air Toxics – Cancer Risk by Census Tract
Layer displays the modeled cancer risk associated with air toxics exposure. Figures represents the likelihood of hazardous exposure per 1 million population.
Air Toxics – Non-Cancer Risk by Census Tract
Layer displays the modeled non-cancer risk associated with air toxics exposure. A hazard index (HI) of 1 or lower means air toxics are unlikely to cause adverse noncancer health effects over a lifetime of exposure.
Air Toxics – Cancer Risk by Census Tract
Layer displays the modeled cancer risk associated with air toxics exposure. Figures represents the likelihood of hazardous exposure per 1 million population.
FEMA National Risk Index, 2021
This layer displays the FEMA National Risk Index score, rating and national and state percentiles for each county and Census tract. These are measures of risks U.S. communities are exposed to for 18 natural hazards. Data was obtained from the FEMA National Risk Index (the Nov. 2021 version).
FEMA National Risk Index, 2023
This layer displays the FEMA National Risk Index score, rating and national and state percentiles for each county and Census tract. These are measures of risks U.S. communities are exposed to for 18 natural hazards. Data was obtained from the FEMA National Risk Index (the March, 2023 version).
Air Toxics – Cancer Risk by Census Tract
Layer displays the modeled cancer risk associated with air toxics exposure. Figures represents the likelihood of hazardous exposure per 1 million population.