Learn the Issues
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Health and Environmental Effects of Ozone Layer Depletion
Learn about the human health and environmental effects of ozone layer depletion.
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Mercury and Air Toxic Standards (MATS) Supporting Documents
These documents were developed in support of the Mercury and Air Toxics Standards (MATS).
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2005 v4.2 Technical Support Document
Technical Support Document for the Final Transport Rule describes how updated 2005 NEI, version 2 emissions and were processed for air quality modeling in support of the Cross-state Air Pollution Rule (CSAPR).
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2005 v4.3 Technical Support Document
Emissions Modeling for the Final Mercury and Air Toxics Standards Technical Support Document describes how updated 2005 NEI, version 2 emissions were processed for air quality modeling in support of the final Mercury and Air Toxics Standards (MATS).
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2007 Version 5.0 Technical Support Document
Preparation of Emissions Inventories for the Version 5.0, 2007 Emissions Modeling Platform describes how emissions based on the 2008 NEI, version 2 and were processed to represent the year 2007 in support of air quality modeling of the PM NAAQS.
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2011 Version 6.1 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling for the years 2011, 2018, and 2025 using the 2011, version 6.1 emissions modeling platform, which is based on the 2011 National Emissions Inventory, Version 1.
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Ports Primer: 8.2 Citizen Science Projects
Communities can demonstrate environmental concerns by providing scientific evidence of environmental impact. Communities may be able to access existing local data and conduct their own analyses or communities may turn to existing studies.
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Ports Primer: A2. Citizen Mapping, Data Tools and Resources
The Ports Primer appendix includes a list of tools which may make the Ports Primer more useful.
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New York City Locomotive Repowers: Collaborative Efforts to Improve Air Quality
The New York City (NYC) Economic Development Corporation and NYC Department of Small Business Services, in collaboration with the U.S. EPA undertook a project to reduce locomotive emissions in and around NYC with CSX Transportation and Waste Management.
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The Collaborative Problem-Solving Cooperative Agreement Program
The Environmental Justice Collaborative Problem-Solving (CPS) Cooperative Agreement Program provides financial assistance to eligible organizations working on or planning to work on projects to address local environmental and/or public health issues
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U.S. - Mexico Border Information Center on Air Pollution (CICA)
The CICA provides resources for emerging and existing air pollution prevention and control technologies and provides public access to data and information on their use, effectiveness and cost.
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Public Hearing on EPA's Proposed Reconsideration of the Final MON Risk and Technology Review
Information about EPA's public hearing for the MON reconsideration
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Energy Efficiency and Your Wood-Burning Appliance
Replacing older stoves with newer, more efficient wood burning appliances.
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Burn Wise: How to Build a Wood Shed
video and .pdf describing how to build a wood shed
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Wood Smoke and Your Health
Health effects from wood smoke.
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Managing Aquaculture to Protect Water Quality
Aquaculture permitting in the NPDES program. Description and resources are provided.
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Publications Supporting Air Emissions Monitoring
This site is about stationary source emissions monitoring. Stationary source emissions monitoring is required to demonstrate that a source is meeting the requirements in Federal or state rules.
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Control of HFC-23 Emissions
Proposed Rulemaking: Phasedown of Hydrofluorocarbons: Allowance Allocation Methodology for 2024 and Later Years.
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2005 v4.1 Technical Support Document
Preparation of Emission Inventories for the Version 4.1, 2005-based Platform describes how emissions from the 2005 NEI, version 2 and were processed for air quality modeling in support of the Boiler MACT and the Mercury and Air Toxics Standards.
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Fluorinated Greenhouse Gas Emissions and Supplies Reported to the GHGRP
Fluorinated Greenhouse Gas Emissions, including American Innovation and Manufacturing (AIM) Act of 2020 data for HFCs