Science & Technology
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Resources for EnviroAtlas Collaborators
Information and document templates to guide the development of data, metadata, widgets, tools and fact sheets.
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The Geography of WATERS
WATERS Geography
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Analysis of the Final Repeal of the Mercury and Air Toxics Standards Amendments
IPM analyses of the Proposed MATS Risk and Technology Review (RTR)
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2025 Reference Case
This area provides information and documentation on EPA’s power sector modeling platform v6, including the associated input data and modeling assumptions, outputs, and documentation.
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Nitrogen Dioxide (NO2 Primary) Air Quality Standards - Documents from Review Completed in 2010
NO2 Primary Documents from Review Completed in 2010
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Lead (Pb) Air Quality Standards - Documents from Review Completed in 2008
Documents from Review Completed in 2008
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Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 1997
Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 1997
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Ozone (O3) Air Quality Standards - Documents from Review Completed in 1997
Ozone (O3) Air Quality Standards - Documents from Review Completed in 1997
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Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Air Quality Standards - Documents from Review Completed in 2012
Nitrogen Dioxide (NO2) and Sulfur Dioxide (SO2) Secondary Air Quality Standards - Documents from Review Completed in 2012
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Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 2006
Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 2006
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Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 2012
Particulate Matter (PM) Air Quality Standards - Documents from Review Completed in 2012
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Nitrogen Dioxide (NO2) Primary Standards - Planning Documents from Current Review
Scientific and technical planning documents used to develop the current nitrogen dioxide primary national ambient air quality standard.
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Human Exposure Modeling - Other Models and Exposure Related Information
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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Nitrogen Dioxide (NO2 Primary) Air Quality Standards - Documents from Review Completed in 2018
NO2 Primary Documents from Review Completed in 2010
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Multimedia Fate and Transport Modeling - Other Models and Related Information
FERA Multimedia Fate and Transport Modeling - Links to Other Models and Related Information
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Human Exposure Modeling - Hazardous Air Pollutant Exposure Model (HAPEM)
Human exposure modeling relates pollutant concentrations in the larger environmental media to pollutant concentrations in the immediate exposure media.
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Risk Assessment and Modeling - SO2 Risk Analyses
Risk characterization as a description of the nature and magnitude of human or ecological risk and the attendant uncertainties.
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Watershed Index Online
A comparative analysis tool for comparing watershed characteristics within user-defined geographic areas to support their strategic planning decisions.
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Ambient Water Quality Monitoring System
This page describes what the ambient water quality monitoring system is, how it functions, and what a user can do with it.
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Support for STOrage and RETrieval and Water Quality Exchange Data Owners
This page contains numerous resources relevant to STORET and WQX data owners.