Science & Technology
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Designation and NAAQS Information Related to 8-Hour Ozone (1997 Standard) - NAAQS Revoked
Designation and NAAQS Information Related to 8-Hour Ozone (1997 Standard) - NAAQS Revoked
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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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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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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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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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Demographics Proximity Tool
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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Enbridge Consent Decree Section VII.J. Independent Third Party Consent Decree Compliance Verification
Compliance with the consent decree.
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Alternative Leak Detection System
Enbridge's Line 5 biota investigation workplan and approval
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BCP Ingredients Inc. Facility in Verona, Missouri
Addressing ethylene oxide is a priority for EPA, which is reviewing its current air regulations that limit the amount of EtO certain types of industries release to determine whether legal standards for EtO emissions to the air should be strengthened.
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Scopes 1 and 2 Emissions Inventorying and Guidance
Utilize EPA-developed GHG inventory guidance that aligns with EPA-specific GHG calculation methodologies, emission factors, and management tools.