Learn the Issues
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Columbia River Basin Restoration Program Reports
Update on work efforts in the Columbia River Basin to reduce toxic contaminants which threaten the health of people, fish and wildlife in the Basin.
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Public hearing on proposed discharge permits for federal hydroelectric projects in the lower Columbia River
Information about EPA's June 7, 2022, public hearing on proposed NPDES permits for federal hydroelectric projects in the Lower Columbia River (Bonneville Project, The Dalles Lock and Dam, John Day Project, and McNary Lock and Dam).
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Chemicals of Emerging Concern in the Columbia River
Information about chemcials of emerging concern (CECs) in the Columbia River Basin.
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Willamette Watershed Toxics Reduction Partnership
Partnership between EPA and Oregon Dept. of Environmental Quality to reduce upstream toxics in the Willamette River in Oregon.
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Title V Air Quality Permit for Amtech Corp. on the Yakama Reservation
EPA's Title V air quality permit for Amtech Corp. on the Yakama Reservation in Wapato, Washington.
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Non-Title V Air Quality Permit for Amtech Corp. on the Yakama Reservation
EPA's non-Title V air permit for Amtech Corp. on the Yakama Reservation in Wapato, Washington.
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Analyses and Reports for Setting Greenhouse Gas (GHG) Emissions Standards for Cars and Trucks
This page provides reports and analyses for setting GHG emissions standards for cars and trucks
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National Wetland Condition Assessment 2016 Site Evaluation Guidelines
National Wetland Condition Assessment 2016 Site Evaluation Guidelines
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National Rivers & Streams Assessment 2008-2009 Quality Assurance Project Plan
National Rivers & Streams Assessment 2008-2009 Quality Assurance Project Plan
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National Wetland Condition Assessment 2016 Lab Operations Manual
National Wetland Condition Assessment 2016 Lab Operations Manual
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National Coastal Condition Assessment 2015 Site Evaluation Guidelines
National Coastal Condition Assessment 2015 Site Evaluation Guidelines
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National Rivers & Streams Assessment 2013-2014 Design
This is the design document for the National Rivers & Streams Assessment in 2013-14.
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National Coastal Condition Report II Factsheet
The NCCR II is based on data gathered by a variety of federal, state and local sources, and includes over 50,000 samples taken between 1997 and 2000 in all continental seacoasts and Puerto Rico.
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National Wetland Condition Assessment 2016 Field Operations Manual
National Wetland Condition Assessment 2016 Field Operations Manual
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National Rivers & Streams Assessment 2008-2009 Site Evaluation Guidelines
The Site Evaluation Guidelines manual for the NRSA 2008-2009.
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National Rivers & Streams Assessment 2008-2009 Field Operations Manual
The Field Operations Manual for the NRSA 2008-2009.
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National Lakes Assessment 2012 Quality Assurance Project Plan
Quality Assurance Project Plan for the NLA 2012
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National Lakes Assessment 2012 Field Operations Manual
Field Operations Manual for the NLA 2012
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National Lakes Assessment 2012 Site Evaluation Guidelines
Site Evaluation Guidelines for the NLA 2012
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National Rivers & Streams Assessment 2008-2009 Laboratory Operations Manual
National Rivers & Streams Assessment 2008-2009 Laboratory Operations Manual