Science & Technology
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Understanding Hypoxia in the Gulf Using CMAQ
The coupled EPIC/CMAQ modeling system simulated impacts on air and land quality of different land use changes driven by potential energy and agricultural management decisions. Linking these results to watershed models allows for analysis of hypoxia events.
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Nitrate in Groundwater - CMAQ
The CMAQ modeling system has been used to examine the linkage between agricultural management, nitrate in groundwater, and potential health effects. Using coupled meteorological, agricultural and air quality models scientists examined inter-related biolog
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CMAQ 25th Anniversary
Celebrating the 25th anniversary of the CMAQ modeling system.
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CMAQ Resources/Utilities for Model Users
Utilize the CMAS Center's help desk and training courses. Browse software programs for preparing CMAQ inputs as well as evaluating and visualizing CMAQ outputs.
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Wildland Fires in CMAQ
The CMAQ model is used to predict how emissions from wildland fires are transported downwind and react in the atmosphere. New field study data allow for further model evaluation and improvement to the way fires are treated in the CMAQ system.
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CMAQ: The Community Multiscale Air Quality Modeling System
CMAQ is a computational tool used for air quality management. It models air pollutants including ozone, particulate matter and other air toxics to help determine optimum air quality management scenarios.
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Get NHDPlus (National Hydrography Dataset Plus) Data
NHDPlus is a geospatial, hydrologic framework dataset that is intended for use by geospatial analysts and modelers to support water resources related applications. NHDPlus was developed by the USEPA in partnership with the US Geologic Survey
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2015 International Emission Inventory Conference - "Air Quality Challenges: Tackling the Changing Face of Emissions"
emission inventory conference 2015, papers, posters, presentations
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Hydrofluorocarbons (HFCs)
The American Innovation and Manufacturing (AIM) Act outlines new requirements for listed hydrofluorocarbons (HFCs). This site will inform the public of the phasedown of HFCs as well as serve as a platform for stakeholder engagement.
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Fifth National Climate Assessment: Resources and Interactive Atlas Webinar Archive
This EPA Tools & Resources webinar, recorded on January 15, 2025, provides an introduction and overview of the 5th National Climate Assessment.
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National Lakes Assessment 2012 Results
Results for the National Lakes Assessment 2012, including key findings, national results, ecoregional results, and state highlights.
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Report: The EPA Left $20 Million Unawarded in the Sewer Overflow and Stormwater Reuse Municipal Grants Program
Report: The EPA Left $20 Million Unawarded in the Sewer Overflow and Stormwater Reuse Municipal Grants Program
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Risk Evaluation for p-Dichlorobenzene
EPA designated p-dichlorobenzene as a high priority chemical in December 2019 and the chemical is currently undergoing risk evaluation.
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Report: Audit of Environmental Finance Centers Providing Water Infrastructure Technical Assistance in EPA Region 4
Report: Audit of Environmental Finance Centers Providing Water Infrastructure Technical Assistance in EPA Region 4
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Hazardous Waste Electronic Manifest System (e-Manifest) Advisory Board
This page is all about the e-manifest Advisory board, formed under the Federal Advisory Committee Act, and part of the EPA's e-manifest development process. Here you can learn about the members and their meetings.
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e-Manifest Advisory Board Membership Roster and Bios
The e-Manifest Advisory Board provides critical support and input to the development and operation of the e-Manifest system. Below is the current e-Manifest Advisory Board roster (in alphabetical order) as well as their biographies.
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West Coast Collaborative: Partnering to Reduce Diesel Emissions
West Coast Collaborative is a voluntary public-private partnership committed to reducing diesel emissions and advancing clean technologies throughout the western United States.
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WhAEM2000 BBM Files - Alzada, South Dakota
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Alzada Quadrangle, South Dakota. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Aberdeen, South Dakota
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Aberdeen Quadrangle, South Dakota. Files serve as geographic basis for groundwater modeling.