Documents and Publications

Under the state’s Groundwater Protection Program, DEQ provides ongoing monitoring and assessment of groundwater management areas throughout the state. On this page you will find links to ongoing groundwater reports as well as facts sheets and related publications.

Groundwater Investigations: Deschutes Basin Klamath Basin La Pine Milton-Freewater North Coast Basin Portland Willamette Basin

DEQ Groundwater Management Area Reports DEQ Internal Management Directives DEQ Legislative Reports Fact Sheets

Groundwater Investigations

• Groundwater Studies and Publications - Oregon Water Resources Department
• Water Resources Studies in Oregon - US Geological Survey

Deschutes Basin

• Groundwater Quality Report for the Deschutes Basin, Oregon - March 2006 - DEQ
• Deschutes Basin Ground-Water Study - USGS

Klamath Basin

• Ground-Water Hydrology of the Upper Klamath Basin, Oregon and California - USGS
• Groundwater Quality Report for the Klamath Basin, Oregon - July 2006 - DEQ
• Upper Klamath Basin Ground-Water Study - USGS

La Pine

• Hydrogeologic and Geochemical Investigations of Ground Water near La Pine, Oregon - USGS
• La Pine National Demonstration Project (EPA, Deschutes County, DEQ, DHS, USGS)
  • La Pine Database Search - Field Data and/or Flow and Usage Data

Milton-Freewater

• April 1999 Milton-Freewater Groundwater Quality Study - June 2000 - DEQ PDF
  • Figures: Maps and Locations PDF
  • Tables: Study Data Pdf
  • Appendix 1: OHD Real Estate Transactions Nitrate and Coliform Testing Data PDF
  • Appendix 2: OHD Public Water Supply Nitrate and Coliform Testing Data PDF
  • Appendix 3: Examples of Letters to Well Owners PDF
  • Appendix 4:  Laboratory Analytical Reports PDF

North Coast Basin

• Groundwater Quality Report for the North Coast Basin, Oregon - October 2004 - DEQ

Portland

• Estimated Depth to Ground Water and Configuration of the Water Table in the Portland, Oregon Area - USGS
• Portland Basin Ground-Water Study (completed 1991) - USGS

Willamette Basin

• Groundwater Quality Report for the Willamette Basin, Oregon - March 2004 - DEQ
• Quality of Shallow Ground Water in Alluvial Aquifers of the Willamette Basin, Oregon, 1993-95 - USGS PDF
• Willamette Basin Ground-Water Study Homepage - USGS

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DEQ Groundwater Management Area Reports

• Lower Umatilla Basin GWMA Reports
• Northern Malheur GWMA Reports
• Southern Willamette Valley GWMA Reports

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DEQ Internal Management Directives

IMDs are documents for DEQ staff that outline program implementation issues.

• Disposal of Municipal Wastewater Treatment Plant Effluent by Indirect Discharge to Surface Water via Groundwater or Hyporheic Water PDF
• Monitoring Background Groundwater Quality Internal Management Directive for Regulating Permitted Operations under OAR 340-040-0030 PDF
• Operations, Monitoring and Management (OM&M) Plans for Land Application of Non-Sanitary Wastewater PDF

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DEQ Legislative Reports

• Groundwater Quality in Oregon - January 2011 PDF
• Groundwater Quality in Oregon - January 2009 PDF
• Groundwater Quality in Oregon - January 2007 PDF
Groundwater Quality in Oregon - January 2005 PDF
• Groundwater Quality in Oregon - January 2003 PDF
• Groundwater Quality in Oregon - January 2001 PDF

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Fact Sheets

DEQ Fact Sheets

• Aquifer Storage and Recovery and Artificial Groundwater Recharge PDF
• Drinking Water Protection for Shallow Injection Well Owners Operators PDF
• Groundwater Basics for Drinking Water Protection PDF
• Lower Umatilla Basin Groundwater Management Area PDF
• Nitrate in Drinking Water PDF
  • Nitratos en Agua de Uso Doméstico
• Northern Malheur County Groundwater Management Area PDF
• Perchlorate in the Lower Umatilla Basin Groundwater Management Area - Issues and Answers PDF
• Residential Well Owners - Water Quality Test Results PDF
• Southern Willamette Valley Groundwater Management Area Declared PDF
• Underground Injection Control Storm Water Information PDF

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