Science & Technology
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National Rivers & Streams Assessment 2013/14 Field Operations Manual Wadeable
The Field Operations Manual for the NRSA 2013/14 Wadeable
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National Rivers & Streams Assessment 2013/14 Field Operations Manual Non-Wadeable
The Field Operations Manual for the NRSA 2013/14 Non-Wadeable
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National Coastal Condition Assessment 2010 Great Lakes Technical Memorandum
PDF of the NCCA 2010 Great Lakes Technical Memorandum
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National Lakes Assessment Design Documents
Design documents for the National Lakes Assessment
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Wadeable Streams Assessment 2004 Report
Download a PDF of the Wadeable Streams Assessment 2004 Report
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Regional Highlight - Mercury in Fish Tissue in the Pacific Northwest
NLA 2012 Highlight - Mercury in fish tissue in three Pacific Northwestern states
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National Coastal Condition Report II (2005)
Download a PDF of the National Coastal Condition Report II 2005
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Memo's of Telephone Conversation Regarding Explosive Storage
Memorandum of Telephone Converstion Between Lieutanant Commander Sequine
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Region 4 Virtual Reading Room - LCP Chemicals Site, Brunswick, GA
Frequently requested region 4 FOIA related documentation about the LCP Chemicals Site in Brunswick, GA
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Regulatory Determination 1 Support Documents for Sulfate
Sulfate Support Documents
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Regulatory Determination 2 Support Document for MTBE
Learn about the support document for MTBE.
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Regulatory Determination 1 Support Documents for Sodium
Sodium Support Document
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EPA Region 4 Air Sensor Loan Programs
EPA R4 now loans portable fine particulate matter (PM2.5) sensors to the public. The program helps drive positive change and improve public health by collecting non-regulatory outdoor air quality data.
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Report: Results of Site Visit to the Wyckoff/Eagle Harbor Superfund Site on Bainbridge Island, Washington
Report: Results of Site Visit to the Wyckoff/Eagle Harbor Superfund Site on Bainbridge Island, Washington
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EPA Response to Request for Reconsideration 12004A, Regarding Drinking Water: Regulatory Determination on Perchlorate
EPA Response to RFR (03/27/2014)
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Electric Vehicle Myths
Facts and myths about electric vehicles.
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Clean Heavy-Duty Vehicles Grant Program
This page has general information on the IRA Clean Heavy-Duty Vehicles Grant Program, with sub-pages dedicated to information on the 2024 Clean Heavy-Duty Vehicles Grant Program, Resources, and (eventually) a sub-page to highlight awarded grantees.
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How to Cite CMAQ
These publications document the algorithms and performance of the CMAQ model. Publications recommended for citation are grouped according to topic and model version.
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CRACMM
The Community Regional Atmospheric Chemistry Multiphase Mechanism
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U.S. Coral Reefs
Coral reefs are among the most biologically diverse and valuable ecosystems on Earth. This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.