Science & Technology
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Frequent Questions About Hydrologic and Water Quality Models
Frequently Asked Questions on the Center for Exposure Assessment Modeling (CEAM) and its models
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Status of EPA Research and Development on PFAS
Contains the status of various ORD activities related to PFAS research and development
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EPA 2018 International Decontamination Research and Development Conference Proceedings
This site allows users to search for presentations, view descriptions, and Q&A from EPA's International Decontamination Conference.
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Tire Crumb Questions and Answers
Questions and Answers about tire crumbs used in turf fields.
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Metadata Populated Place Locations
Populated Place Point Locations for CONUS, Alaska, and Hawaii in BASINS
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BASINS Metadata
Metadata or "data about data" describes the content, quality, condition, and other characteristics of data. Geospatial metadata are critical to data discovery and serves as the fuel for the Geospatial One-Stop data portal.
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Stakeholder Process for Natural Gas and Petroleum Systems in the 1990-2022 Inventory
This page provides information about stakeholder meetings and webinars on updates under consideration for the 1990-2022 GHG Inventory (to be released in April 2024).
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Environmental Fluid Dynamics Code (EFDC)
Page on EFDC Environmental Fluid Dynamics Code (EFDC) multifunctional surface water modeling system software information, including model abstract & model usage
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Holding Time & Preservation
Holding Time & Preservation, Frequent Questions
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8000 Series: Chromatographic Separation Methods
8000 Series: Chromatographic Separation Methods, Frequent questions
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Overview of Total Maximum Daily Load (TMDL) Progress Assessment
EPA assessed the progress 14 TMDLs in the SF Bay Delta Estuary (SF Bay Delta) to determine if the actions called for in the TMDL were being accomplished and water quality was improving. Status and water quality reports can be found here.
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AgSTAR Data and Trends
Provides information on current trends regarding anaerobic digestion in the U.S. Includes information numbers of projects and energy and environmental benefits.
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TMDL Progress Assessment Documents: Dissolved Oxygen
San Francisco Bay Delta water quality progress report focusing on the pesticides dissolved oxygen levels in the Stockton Deep Water Ship Channel.
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TMDL Progress Assessment Documents: Mercury
Collection of San Francisco Bay Delta Water Quality Progress Reports focusing on mercury/methylmercury.
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Open-Source Software and Code Repositories
Information about code and code repositories used in the development of applications at EPA
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Enterprise Architecture
EPA's Enterprise Architecture program supports the design of EPA systems and governs the technology used.
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eBEACHES Location Data SOP v2.1
eBEACHES Location Data SOP v2.1
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Petroleum Vapor Intrusion Database
Review a technical report evaluating the petroleum vapor intrusion database.
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Methylmercury and Irrigated Agriculture in the Sacramento-San Joaquin Delta
Key observations from as well as the final report, "Characterization of Methylmercury Loads for Irrigated Agriculture in the Delta".
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Project Profile: Barstow's Longview Farm
This project profile for Barstow’s Longview Farm, located in Hadley, Massachusetts, includes information about the farm's anaerobic digestion system, feedstock, benefits, and recognition.