Science & Technology
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Final Guidance on the Preparation of Exceptional Events Demonstrations for Wildfire Events that May Influence Ozone Concentrations
The EPA Headquarters and EPA Regional offices collaborated in the development of this guidance to assist air agencies preparing exceptional events demonstrations for wildfire influences on ozone concentrations.
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Ecoregions Publications
A list of publications giving details about ecoregions, which are areas of general similarity in the type, quality, and quantity of environmental resources.
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Level III and IV Ecoregions of the Continental United States
Information and downloadable maps and datasets for Level III and IV ecoregions of the continental United States. Ecoregions are areas of general similarity in the type, quality, and quantity of environmental resources.
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Ecoregions of North America
Information and downloadable maps and datasets for ecoregions of North America, which are areas of general similarity in the type, quality, and quantity of environmental resources.
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Exceptional Events Documents Ozone - New Jersey
Exceptional Events Documents Ozone - Massachusetts
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Particulate Matter NAAQS Review - Analyses and Data Sets
Analyses and data sets for the Particulate Matter NAAQS review
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NHDPlus Tools
A list of tools used in conjuction with NHDPlus version 2.
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The Reach Address Database (RAD)
The Reach Address Database (RAD) stores reach address information for each Water Program feature that has been linked to the underlying surface water features (streams, lakes, etc) in the National Hydrology Database (NHD) Plus dataset.
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Learn More about Water Quality Data
The STORET (short for STOrage and RETrieval) Data Warehouse is a repository for water quality, biological, and physical data and is used by state environmental agencies, EPA and other federal agencies, universities, private citizens, and many others.
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Map Design & Cartography at the EPA
This web page describes cartography best practices at the EPA
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Guidance for Using Tribal Boundaries, Areas and Names Resources
Webpage highlighting the Guidance for Using EPA Tribal Boundaries, Areas and Names Resources.
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Previous NEI Reports
Previous reports for the 2011 and 2008 NEIs.
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Emissions Inventory System (EIS) User's Manual and How To's
Emissions Inventory System (EIS) documentation.
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2014-2016 Version 7 Air Emissions Modeling Platforms
The 2014-2016 Version 7 emissions modeling platforms are based on 2014 NEIv2.
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Health Effects Notebook for Hazardous Air Pollutants
Health Effects Notebook - Health Effects Fact Sheets
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Including Energy Efficiency and Renewable Energy Policies in Electricity Demand Projections
Find more information on how state and local air agencies can identify on-the-books EE/RE policies, develop a methodology for projecting a jurisdiction's energy demand, and estimate the change in power sector emissions.
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Valuing Aquatic Ecosystem Health at a National Scale: Modeling Biological Indicators Across Space and Time
This is a working paper titled "Valuing Aquatic Ecosystem Health at a National Scale: Modeling Biological Indicators Across Space and Time"
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Working Paper: When it Rains, it Pours: Severe Weather Events, Flooding, and Drinking Water Quality
This is a working paper titled "When it Rains, it Pours: Severe Weather Events, Flooding, and Drinking Water Quality "
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EPA Technologies Available for Licensing:
Find EPA hazardous substances and contaminated site patented technologies available to be licensed, such as the Method to Predict Degradation of a Landfill.
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Process for Developing Dioxin Cleanup Decisions at Superfund Sites
Access guidance about cleanup work at Superfund sites with dioxin contamination.