Science & Technology
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Designation and NAAQS Information Related to Nitrogen Dioxide (1971 Standard)
Designation and NAAQS Information Related to Nitrogen Dioxide (1971 Standard)
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Transportation, Air Pollution and Climate Change
Learn how emissions reductions, advancements in fuels and fuel economy, and working with industry to find solutions to air pollution problems benefit human and environmental health, create consumer savings and are cost effective.
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State and Local Transportation Resources
This web area is designed to provide resources to state and local governments and their citizens about transportation and air quality.
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Mobile Source Pollution and Related Health Effects
This site provides information on the health effects of air toxics from vehicles to both groups and individuals looking to further their subject knowledge, learn about EPA’s role in reducing air toxics, and find out how individuals can play a role.
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United States 2030 Food Loss and Waste Reduction Goal
On September 16, 2015, the United States Department of Agriculture (USDA) and the United States Environmental Protection Agency (EPA) announced the first ever domestic goal to reduce food loss and waste by half by the year 2030.
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National Aquatic Resource Surveys
EPA reports information on the condition of our nation's waters using probabilistic surveys. The National Aquatic Resource Surveys assess the status of and changes in water quality of the nation's coastal waters, lakes, rivers and streams, and wetlands.
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NATA Limitations
Summary of the limitations of the 2005 NATA
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NATA Overview
Background information about the National Air Toxics Assessment - what it is and how to use the data
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2005 NATA: Assessment Methods
Information about assessment methods used in the 2005 NATA assessment
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2005 National Air Toxics Assessment
Background information on the 2005 National Air Toxics Assessment
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2014 NATA: Assessment Methods
Information about assessment methods used in the 2014 NATA assessment
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2011 National Air Toxics Assessment
Background information on the 2011 National Air Toxics Assessment
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Hazardous Air Pollutants
This area will provide an overview of hazardous air pollutants and EPA's approach to understanding and regulating them. The area will have access to regulations for industrial sources of air toxics.
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Download Hazardous Air Pollutant Exposure Model (HAPEM)
The HAPEM model has been designed to estimate inhalation exposure for selected population groups to various air toxics.
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Hazardous Air Pollutant Exposure Model (HAPEM) User's Guides
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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Supporting Documentation APEX/TRIM.Expo Inhalation Model
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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MIMS for TRIM
MIMS supports complex computational studies that use multiple interrelated models / programs, such as the modules within TRIM. MIMS is used by TRIM to run various models in sequence, while sharing input and output files.
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2019 AirToxScreen: Emissions Update Document
AirToxScreen emissions update document
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2014 NATA: Results Summary
A summary of results from EPA's 2014 National Air Toxics Assessment (NATA)
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National Air Toxics Assessment
NATA is an ongoing thorough evaluation of air toxics in the U.S. Intended as a screening tool, it helps air agencies learn which pollutants, emission sources and places they may wish to study further to better understand possible public health risks.