Official Government Website

Groundwater Reports and Data

DEQ staff conducts groundwater monitoring projects at various locations around the state. This work is summarized into annual reports and, at times, technical reports on specific groundwater contaminants or special projects. These reports and other site-specific groundwater documents may be accessed here.

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Report Report NameDate
2019 Groundwater Quality Monitoring Projects Summary Report2019 (September)
Groundwater Contamination and Monitoring Activities on the Rathdrum Prairie Aquifer, Kootenai County-1991
Groundwater Vulnerability Assessment, Snake River Plain, Southern Idaho 1991 (April)
Idaho Snake-Payette Rivers Hydrologic Unit Groundwater Quality Assessment 1993 (July)
Black Cliffs Groundwater Quality Study: Nitrate Impact 1994 (October)
Groundwater and Soils Reconnaissance of the Lower Payette Area, Payette County, Idaho 1994 (December)
An Evaluation of Arsenic in Groundwater in a Portion of Washington County, Idaho 1995 (September)
Moscow Basin Groundwater Quality Study 1995 (October)
An Evaluation of Bacteria in Groundwater Near Mountain Home, Elmore County,Idaho 1996 (March)
An Evaluation of Bacteria in Groundwater in Prairie, Elmore County, Idaho 1997 (August)
Russell Sole Source Aquifer Groundwater Monitoring 1997 (March)
Groundwater Investigation of Nitrate and Pesticides in Northwest Ada County, Idaho 1997 (July)
Assessment of Sources of Elevated Nitrate in Groundwater in Northwest Ada County County, Idaho, Using Environmental Isotopes 1999 (November)
A Reconnaissance of Nitrite/Nitrate in Camas Prairie Groundwater, Vol. 1, Lewis and Idaho County, Idaho 1998 (September)
An Evaluation of Methyl Tert-Butyl Ether (MTBE) in Groundwater at Leaking UST Sites in Idaho
Cumulative Impacts Assessment, Thousand Springs Area of the Eastern Snake River Plain, Idaho 2000 (July)
Groundwater Quality Investigation and Wellhead Protection Study, Ferdinand, Idaho 2000 (July)
Groundwater Quality Investigation and Wellhead Protection Study, City of Ashton, Idaho 2001 (August)
Groundwater Quality Investigation and Wellhead Protection Study, Grand View, Idaho 2000 (October)
Groundwater Quality Investigation and Wellhead Protection Study, City of Fruitland, Idaho 2000 (August)
A Reconnaissance of Groundwater Nitrite/Nitrate in the Cow Creek Watershed, Volume I of II 2001 (August)
Environmental Isotope Studies of Wastewater and Groundwater at Wastewater Land Treatment Sites in Idaho 2004 (June)
Clearwater Plateau Nitrate Groundwater Data Analysis 2003
Evaluation of Water Quality Impacts Associated with FMC and Simplot Phosphate Ore Processing Facilities, Pocatello, Idaho 2004 (January)
A Reconnaissance of Subsurface Tile Drain Groundwater in the Cow Creek Watershed, Latah and Nez Perce County, Idaho 2003 (April)
Preliminary Evaluations of Arsenic Detections in Groundwater: A County-Level Arsenic Review 2004 (November)
Isotopic Age Dating of Municipal Water Wells in the Lewiston Basin, Idaho 2005 (August)
The Ramsey Channel of the Spokane Valley-Rathdrum Prairie Aquifer 2005 (June)
Arena Valley Groundwater Quality, Wilder Area, Idaho 2006 (May)
2005 Update, Thousand Springs Area of the Eastern Snake River Plain, Idaho 2006 (December)
Treasure Valley Nutrient-Pathogen Validation Study 2006 (October)
Camas Prairie Nitrate Priority Area: Groundwater Monitoring Results 2008 (January)
Well CM-1 Evaluation, Craigmont, Idaho 2007 (December)
Sagle, Idaho Area Groundwater Quality Study 2008 (February)
Groundwater Report, Silverwood Area of the Rathdrum Prairie Sensitive Resource Aquifer 2008 (November)
Groundwater Report, Oregon Trail Subdivision, Twin Falls, Idaho 2008 (September)
Arsenic Occurrence in Groundwater in the Market Lake Area, Idaho 2008 (November)
Sunnyside Groundwater Monitoring Project Report: Former Sunnyside Feedlot and Vicinity, Weiser, Idaho 2009 (January)
Mountain Home South Groundwater Nitrate Study 2009 (May)
Groundwater Quality Monitoring Results for the Purple Sage Study Area, Canyon County, Idaho 2009 (June)
Possible Sources of Nitrate to the Springs of Southern Gooding County, Eastern Snake River Plain, Idaho 2009 (December)
Nitrate and Emerging Contaminants Evaluation of Springdale, Idaho: Cassia CountyNitrate Priority Area 2009 (December)
2007 and 2008 Groundwater Quality Monitoring Projects Summary Report 2010 (April)
Chilco Area of the Spokane Valley-Rathdrum Prairie Aquifer 2010 (November)
2009 Groundwater Quality Monitoring Projects Summary Report 2011 (March)
Follow-up Sampling for Bacteria, Nitrates, Major Ions, Stable Isotopes, and Tritium 2009-1010: Ashton-Drummond Nitrate Priority Area 2011 (December)
2010 Groundwater Quality Monitoring Projects Summary Report 2013 (November)
2011 Groundwater Quality Monitoring Projects Summary Report 2013 (November)
2012 Groundwater Quality Monitoring Projects Summary Report 2014 (July)
2013 Groundwater Quality Monitoring Projects Summary Report 2015 (February)
2014 Groundwater Quality Monitoring Projects Summary Report 2016 (March)
2015 Groundwater Quality Monitoring Projects Summary Report 2017 (January)
2016 Groundwater Quality Monitoring Projects Summary Report 2018 (April)
2017 Groundwater Quality Monitoring Projects Summary Report 2019 (June)
2018 Groundwater Quality Monitoring Projects Summary Report 2021 (March)
2020 Groundwater Quality Monitoring Projects Summary Report 2023 (February)
CountryDocumentDate
Ada CountyAda County Groundwater Quality Improvement and Drinking Water Source Protection Plan2023
Owyhee CountyOwyhee County Groundwater Quality Improvement and Drinking Water Source Protection Plan2023
Washington CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2022
Canyon County
Groundwater Quality Improvement and Drinking Water Source Protection Plan 2022 Update
2022
Payette CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2023
Adams CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2022
Valley CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2022
Elmore CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2020
Gen CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2020
Boise CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2019
Ada CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2018
Adams CountyGroundwater Quality Improvement and Drinking Water Source Improvement Plan2014
Bannock CountyAn Objective GIS Screening Tool for Rating the Suitability of Land for Septic-based DevelopmentAugust 2012
Lower Boise/Canyon CountyNitrate Degraded Groundwater Quality Summary ReportDecember 2001
Ada and Canyon CountiesGroundwater Study of the Lower Boise River ValleyMay 1996
Camas PrairieNitrate Priority Area: Groundwater Quality Management PlanMay 28, 2008
Canyon CountyPreliminary Assessment of Hydrogeology and Water Quality in GroundwaterFebruary 2007
Canyon CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2016
Canyon CountyGroundwater Study along the Boise River CorridorDecember 2000
Valley CountyPreliminary Hydrogeology of the Cascade AreaFebruary 2005
Lewis CountyGroundwater Quality Evaluation, Craigmont, IdahoFebruary 2001
Elmore CountyGroundwater Quality Improvement and Drinking Water Source Protection PlanFebruary 2014
Gem CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2014
Western Country Estates, Nampa, Ground Water ReportFebruary 2003
Owyhee County2001 Annual Groundwater Quality Monitoring Summary Results for Northwest Owyhee County, IdahoDecember 2002
Owyhee County Groundwater Quality Improvement and Drinking Water Source Protection Plan2018
Owyhee CountyGroundwater Quality Improvement and Drinking Water Source Protection PlanMarch 2010
Payette CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2018
Payette CountyGroundwater Quality Improvement and Drinking Water Source Protection PlanMay 2012
Power CountySources of Nitrate Contamination in Groundwater of Pleasant ValleyMay 2008
Bannock CountyThe Business Community Perspective on Enhanced Protection for the Lower Portneuf Valley AquiferFebruary 2002
Bannock CountyEconomic Impacts of Enhanced Aquifer Protection for the Lower Portneuf River Valley Aquifer: Final ReportSeptember 2001
Spokane CountyThe Rathdrum Prairie Aquifer Technical ReportAugust 1988
Spokane CountyThe Spokane Valley-Rathdrum Prairie Aquifer Atlas: 2015 Update2015
Washington CountyScott Creek/Mann Creek Nitrate Degraded Groundwater Quality Summary ReportMarch 2002
Bonneville CountySnake Plain Aquifer Technical ReportSeptember 1985
Teton CountyPreliminary Assessment of Hydrogeology and Water Quality in Groundwater in Teton County, IdahoMarch 2007
Canyon CountyIsotopic and Geochemical Investigation in the Source of Elevated Uranium Concentrations in the Treasure Valley Aquifer, IdahoApril 2011
Washington CountyGroundwater Quality Improvement and Drinking Water Source Protection Plan2014
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