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Groundwater Data & Monitoring

Northern Region
Groundwater Level Measurement Information

Introduction

To manage groundwater, it is important to know its depth below the surface. This information can be used to determine the amount of groundwater that can safely be withdrawn for use. From the data provided by monitoring, local water managers can prevent wells from going dry and prevent the movement of poor quality groundwater into an aquifer.

Data Collection & Management

DWR's Northern Region and its cooperators monitor groundwater levels in over 1,000 wells in Northern California. These measurements are made twice a year: once in spring, when levels are highest, and once in fall, when levels are lowest. In some areas, groundwater levels are measured quarterly. The Northern Region maintains an electronic database of groundwater level measurements for Northern California. The database contains over 100,000 individual groundwater level measurements, some dating back to the early 1920's. These data are available in printed reports or in electronic format, accessible through a Map Interface or through a form interface, by Groundwater Basin or by Township.

Groundwater level data have also been summarized in the following formats:

   Sacramento Valley Groundwater Level Monitoring Reports and Maps
   Sacramento Valley Groundwater Contour Maps
   Sacramento Valley Well Depth Summary Maps

Sacramento Valley Groundwater Level Monitoring Reports and Maps

Groundwater level monitoring reports and maps summarize the groundwater level measurements collected from wells in the northern Sacramento Valley. The groundwater level data presented includes the Sacramento Valley and Redding groundwater basin portions of Butte, Colusa, Glenn, Tehama, and Shasta counties.

 

Spring 2017

Plate 1S-A - Spring 2016 to Spring 2017 - GWE Change in Shallow Wells
Plate 1I-A - Spring 2016 to Spring 2017 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2016 to Spring 2017 - GWE Change in Deep Wells

Plate 1S-B - Spring 2004 to Spring 2017 - GWE Change in Shallow Wells
Plate 1I-B - Spring 2004 to Spring 2017 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2017 - GWE Change in Deep Wells

Plate 1S-C - Spring 2011 to Spring 2017 - GWE Change in Shallow Wells
Plate 1I-C - Spring 2011 to Spring 2017 - GWE Change in Intermediate Wells
Plate 1D-C - Spring 2011 to Spring 2017 - GWE Change in Deep Wells

Plate 1C-A - Spring 2016 to Spring 2017 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Spring 2004 to Spring 2017 - GWE Change in 100 to 450 ft Wells
Plate 1C-C - Spring 2011 to Spring 2017 - GWE Change in 100 to 450 ft Wells

 

Fall 2016

Plate 1S-A - Fall 2015 to Fall 2016 - GWE Change in Shallow Wells
Plate 1I-A - Fall 2015 to Fall 2016 - GWE Change in Intermediate Wells
Plate 1D-A - Fall 2015 to Fall 2016 - GWE Change in Deep Wells

Plate 1S-C - Fall 2011 to Fall 2016 - GWE Change in Shallow Wells
Plate 1I-C - Fall 2011 to Fall 2016 - GWE Change in Intermediate Wells
Plate 1D-C - Fall 2011 to Fall 2016 - GWE Change in Deep Wells

Plate 1S-B - Fall 2004 to Fall 2016 - GWE Change in Shallow Wells
Plate 1I-B - Fall 2004 to Fall 2016 - GWE Change in Intermediate Wells
Plate 1D-B - Fall 2004 to Fall 2016 - GWE Change in Deep Wells

Plate 1C-A - Fall 2015 to Fall 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Fall 2004 to Fall 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-C - Fall 2011 to Fall 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-D - Fall 2006 to Fall 2016 - GWE Change in 100 to 450 ft Wells

 

Summer 2016

Plate 1S-A - Summer 2015 to Summer 2016 - GWE Change in Shallow Wells
Plate 1I-A - Summer 2015 to Summer 2016 - GWE Change in Intermediate Wells
Plate 1D-A - Summer 2015 to Summer 2016 - GWE Change in Deep Wells

Plate 1S-C - Summer 2011 to Summer 2016 - GWE Change in Shallow Wells
Plate 1I-C - Summer 2011 to Summer 2016 - GWE Change in Intermediate Wells
Plate 1D-C - Summer 2011 to Summer 2016 - GWE Change in Deep Wells

Plate 1S-B - Summer 2004 to Summer 2016 - GWE Change in Shallow Wells
Plate 1I-B - Summer 2004 to Summer 2016 - GWE Change in Intermediate Wells
Plate 1D-B - Summer 2004 to Summer 2016 - GWE Change in Deep Wells

Plate 1C-A - Summer 2015 to Summer 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-C - Summer 2011 to Summer 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Summer 2004 to Summer 2016 - GWE Change in 100 to 450 ft Wells

 

Spring 2016

Plate 1S-A - Spring 2015 to Spring 2016 - GWE Change in Shallow Wells
Plate 1I-A - Spring 2015 to Spring 2016 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2015 to Spring 2016 - GWE Change in Deep Wells

Plate 1S-B - Spring 2004 to Spring 2016 - GWE Change in Shallow Wells
Plate 1I-B - Spring 2004 to Spring 2016 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2016 - GWE Change in Deep Wells

Plate 1S-C - Spring 2011 to Spring 2016 - GWE Change in Shallow Wells
Plate 1I-C - Spring 2011 to Spring 2016 - GWE Change in Intermediate Wells
Plate 1D-C - Spring 2011 to Spring 2016 - GWE Change in Deep Wells

Plate 1C-A - Spring 2015 to Spring 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Spring 2004 to Spring 2016 - GWE Change in 100 to 450 ft Wells
Plate 1C-C - Spring 2011 to Spring 2016 - GWE Change in 100 to 450 ft Wells

 

Fall 2015

Plate 3S-A - Fall 2014 to Fall 2015 - GWE Change in Shallow Wells
Plate 3I-A - Fall 2014 to Fall 2015 - GWE Change in Intermediate Wells
Plate 3D-A - Fall 2014 to Fall 2015 - GWE Change in Deep Wells

Plate 3S-B - Fall 2004 to Fall 2015 - GWE Change in Shallow Wells
Plate 3I-B - Fall 2004 to Fall 2015 - GWE Change in Intermediate Wells
Plate 3D-B - Fall 2004 to Fall 2015 - GWE Change in Deep Wells

Plate 3S-C - Fall 2011 to Fall 2015 - GWE Change in Shallow Wells
Plate 3I-C - Fall 2011 to Fall 2015 - GWE Change in Intermediate Wells
Plate 3D-C - Fall 2011 to Fall 2015 - GWE Change in Deep Wells

Plate 3C-A - Fall 2014 to Fall 2015 - GWE Change in 100 to 450 ft Wells
Plate 3C-B - Fall 2004 to Fall 2015 - GWE Change in 100 to 450 ft Wells
Plate 3C-C - Fall 2011 to Fall 2015 - GWE Change in 100 to 450 ft Wells

 

Summer 2015

Plate 2S-A - Summer 2014 to Summer 2015 - GWE Change in Shallow Wells
Plate 2I-A - Summer 2014 to Summer 2015 - GWE Change in Intermediate Wells
Plate 2D-A - Summer 2014 to Summer 2015 - GWE Change in Deep Wells

Plate 2S-B - Summer 2004 to Summer 2015 - GWE Change in Shallow Wells
Plate 2I-B - Summer 2004 to Summer 2015 - GWE Change in Intermediate Wells
Plate 2D-B - Summer 2004 to Summer 2015 - GWE Change in Deep Wells

Plate 2S-C - Summer 2011 to Summer 2015 - GWE Change in Shallow Wells
Plate 2I-C - Summer 2011 to Summer 2015 - GWE Change in Intermediate Wells
Plate 2D-C - Summer 2011 to Summer 2015 - GWE Change in Deep Wells

Plate 2C-A - Summer 2014 to Summer 2015 - GWE Change in 100 to 450 ft Wells
Plate 2C-B - Summer 2004 to Summer 2015 - GWE Change in 100 to 450 ft Wells
Plate 2C-C - Summer 2011 to Summer 2015 - GWE Change in 100 to 450 ft Wells

 

Spring 2015

Plate 1S-A - Spring 2014 to Spring 2015 - GWE Change in Shallow Wells
Plate 1I-A - Spring 2014 to Spring 2015 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2014 to Spring 2015 - GWE Change in Deep Wells

Plate 1S-C - Spring 2011 to Spring 2015 - GWE Change in Shallow Wells
Plate 1I-C - Spring 2011 to Spring 2015 - GWE Change in Intermediate Wells
Plate 1D-C - Spring 2011 to Spring 2015 - GWE Change in Deep Wells

Plate 1S-B - Spring 2004 to Spring 2015 - GWE Change in Shallow Wells
Plate 1I-B - Spring 2004 to Spring 2015 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2015 - GWE Change in Deep Wells

Plate 1C-A - Spring 2014 to Spring 2015 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Spring 2004 to Spring 2015 - GWE Change in 100 to 450 ft Wells
Plate 1C-C - Spring 2011 to Spring 2015 - GWE Change in 100 to 450 ft Wells

 

Fall 2014

Plate 3S-A - Fall 2013 to Fall 2014 - GWE Change in Shallow Wells
Plate 3I-A - Fall 2013 to Fall 2014 - GWE Change in Intermediate Wells
Plate 3D-A - Fall 2013 to Fall 2014 - GWE Change in Deep Wells

Plate 3S-B - Fall 2004 to Fall 2014 - GWE Change in Shallow Wells
Plate 3I-B - Fall 2004 to Fall 2014 - GWE Change in Intermediate Wells
Plate 3D-B - Fall 2004 to Fall 2014 - GWE Change in Deep Wells

Plate 3C-A - Fall 2013 to Fall 2014 - GWE Change in 100 to 450 ft Wells
Plate 3C-B - Fall 2004 to Fall 2014 - GWE Change in 100 to 450 ft Wells

 

Summer 2014

Plate 2S-A - Summer 2013 to Summer 2014 - GWE Change in Shallow Wells
Plate 2I-A - Summer 2013 to Summer 2014 - GWE Change in Intermediate Wells
Plate 2D-A - Summer 2013 to Summer 2014 - GWE Change in Deep Wells

Plate 2S-B - Summer 2004 to Summer 2014 - GWE Change in Shallow Wells
Plate 2I-B - Summer 2004 to Summer 2014 - GWE Change in Intermediate Wells
Plate 2D-B - Summer 2004 to Summer 2014 - GWE Change in Deep Wells

Plate 2C-A - Summer 2013 to Summer 2014 - GWE Change in 100 to 450 ft Wells
Plate 2C-B - Summer 2004 to Summer 2014 - GWE Change in 100 to 450 ft Wells

 

Spring 2014

Plate 1S-A - Spring 2013 to Spring 2014 - GWE Change in Shallow Wells
Plate 1I-A - Spring 2013 to Spring 2014 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2013 to Spring 2014 - GWE Change in Deep Wells

Plate 1S-B - Spring 2004 to Spring 2014 - GWE Change in Shallow Wells
Plate 1I-B - Spring 2004 to Spring 2014 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2014 - GWE Change in Deep Wells

Plate 1C-A - Spring 2013 to Spring 2014 - GWE Change in 100 to 450 ft Wells
Plate 1C-B - Spring 2004 to Spring 2014 - GWE Change in 100 to 450 ft Wells

 

Fall 2013

Plate 3S-A - Fall 2012 to Fall 2013 - GWE Change in Shallow Wells
Plate 3I-A - Fall 2012 to Fall 2013 - GWE Change in Intermediate Wells
Plate 3D-A - Fall 2012 to Fall 2013 - GWE Change in Deep Wells

Plate 3S-B - Fall 2004 to Fall 2013 - GWE Change in Shallow Wells
Plate 3I-B - Fall 2004 to Fall 2013 - GWE Change in Intermediate Wells
Plate 3D-B - Fall 2004 to Fall 2013 - GWE Change in Deep Wells

 

Summer 2013

Plate 2S-A - Summer 2012 to Summer 2013 - GWE Change in Shallow Wells
Plate 2I-A - Summer 2012 to Summer 2013 - GWE Change in Intermediate Wells
Plate 2D-A - Summer 2012 to Summer 2013 - GWE Change in Deep Wells

Plate 2S-B - Summer 2004 to Summer 2013 - GWE Change in Shallow Wells
Plate 2I-B - Summer 2004 to Summer 2013 - GWE Change in Intermediate Wells
Plate 2D-B - Summer 2004 to Summer 2013 - GWE Change in Deep Wells

 

Spring 2013

Plate 1I-A - Spring 2012 to Spring 2013 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2012 to Spring 2013 - GWE Change in Deep Wells

Plate 1I-B - Spring 2004 to Spring 2013 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2013 - GWE Change in Deep Wells

 

Fall 2012

Plate 3S-A - Fall 2011 to Fall 2012 - GWE Change in Shallow Wells
Plate 3I-A - Fall 2011 to Fall 2012 - GWE Change in Intermediate Wells
Plate 3D-A - Fall 2011 to Fall 2012 - GWE Change in Deep Wells

Plate 3S-B - Fall 2004 to Fall 2012 - GWE Change in Shallow Wells
Plate 3I-B - Fall 2004 to Fall 2012 - GWE Change in Intermediate Wells
Plate 3D-B - Fall 2004 to Fall 2012 - GWE Change in Deep Wells

 

Summer 2012

Plate 2S-A - Summer 2011 to Summer 2012 - GWE Change in Shallow Wells
Plate 2I-A - Summer 2011 to Summer 2012 - GWE Change in Intermediate Wells
Plate 2D-A - Summer 2011 to Summer 2012 - GWE Change in Deep Wells

Plate 2S-B - Summer 2004 to Summer 2012 - GWE Change in Shallow Wells
Plate 2I-B - Summer 2004 to Summer 2012 - GWE Change in Intermediate Wells
Plate 2D-B - Summer 2004 to Summer 2012 - GWE Change in Deep Wells

 

Spring 2012

Plate 1S-A - Spring 2011 to Spring 2012 - GWE Change in Shallow Wells
Plate 1I-A - Spring 2011 to Spring 2012 - GWE Change in Intermediate Wells
Plate 1D-A - Spring 2011 to Spring 2012 - GWE Change in Deep Wells

Plate 1S-B - Spring 2004 to Spring 2012 - GWE Change in Shallow Wells
Plate 1I-B - Spring 2004 to Spring 2012 - GWE Change in Intermediate Wells
Plate 1D-B - Spring 2004 to Spring 2012 - GWE Change in Deep Wells

 

Fall 2011

Plate 3S-A - Fall 2010 to Fall 2011 - GWE Change in Shallow Wells
Plate 3I-A - Fall 2010 to Fall 2011 - GWE Change in Intermediate Wells
Plate 3D-A - Fall 2010 to Fall 2011 - GWE Change in Deep Wells

Plate 3S-B - Fall 2004 to Fall 2011 - GWE Change in Shallow Wells
Plate 3I-B - Fall 2004 to Fall 2011 - GWE Change in Intermediate Wells
Plate 3D-B - Fall 2004 to Fall 2011 - GWE Change in Deep Wells

 

Summer 2011

Plate 1 - Summer 2010 to Summer 2011 - GWE Change in Shallow Wells
Plate 2 - Summer 2010 to Summer 2011 - GWE Change in Intermediate Wells
Plate 3 - Summer 2010 to Summer 2011 - GWE Change in Deep Wells
Plate 4 - Summer 2010 to Summer 2011 - GWE Change in Observation Wells

Plate 1 - Summer 2004 to Summer 2011 - GWE Change in Shallow Wells
Plate 2 - Summer 2004 to Summer 2011 - GWE Change in Intermediate Wells
Plate 3 - Summer 2004 to Summer 2011 - GWE Change in Deep Wells
Plate 4 - Summer 2004 to Summer 2011 - GWE Change in Observation Wells

 

Spring 2011

Plate 1 - Spring 2010 to Spring 2011 - GWE Change in Shallow Wells
Plate 2 - Spring 2010 to Spring 2011 - GWE Change in Intermediate Wells
Plate 3 - Spring 2010 to Spring 2011 - GWE Change in Deep Wells
Plate 4 - Spring 2010 to Spring 2011 - GWE Change in Observation Wells

 

Plate 1 - Spring 2004 to Spring 2011 - GWE Change in Shallow Wells
Plate 2 - Spring 2004 to Spring 2011 - GWE Change in Intermediate Wells
Plate 3 - Spring 2004 to Spring 2011 - GWE Change in Deep Wells
Plate 4 - Spring 2004 to Spring 2011 - GWE Change in Observation Wells

 

Fall 2010

Plate 1 - Fall 2009 to Fall 2010 - GWE Changes in Wells Up to 200 ft in Depth
Plate 2 - Fall 2009 to Fall 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Fall 2009 to Fall 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Fall 2009 to Fall 2010 - GWE Change in Dedicated Observation Wells

 

Plate 1 - Fall 2004 to Fall 2010 - GWE Changes in Well Up to 200 ft in Depth
Plate 2 - Fall 2004 to Fall 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Fall 2004 to Fall 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Fall 2004 to Fall 2010 - GWE Change in Dedicated Observation Wells

 

Summer 2010

Plate 1 - Summer 2009 to Summer 2010 - GWE Changes in Wells Up to 200 ft in Depth
Plate 2 - Summer 2009 to Summer 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Summer 2009 to Summer 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Summer 2009 to Summer 2010 - GWE Change in Dedicated Observation Wells

 

Plate 1 - Summer 2004 to Summer 2010 - GWE Changes in Well Up to 200 ft in Depth
Plate 2 - Summer 2004 to Summer 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Summer 2004 to Summer 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Summer 2004 to Summer 2010 - GWE Change in Dedicated Observation Wells

 

Spring 2010

Plate 1 - Spring 2009 to Spring 2010 - GWE Changes in Wells Up to 200 ft in Depth
Plate 2 - Spring 2009 to Spring 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Spring 2009 to Spring 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Spring 2009 to Spring 2010 - GWE Change in Dedicated Observation Wells

 

Plate 1 - Spring 2004 to Spring 2010 - GWE Changes in Well Up to 200 ft in Depth
Plate 2 - Spring 2004 to Spring 2010 - GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Spring 2004 to Spring 2010 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Spring 2004 to Spring 2010 - GWE Change in Dedicated Observation Wells

 

Fall 2009

Groundwater Change Report Fall 2008 to Fall 2009 - Sacramento Valley and Redding Basins

 

Plate 1 - Fall 2004 to Fall 2009 GWE Change in Wells Up to 200 ft in Depth
Plate 2 - Fall 2004 to Fall 2009 GWE Change in Wells From 200 to 600 ft in Depth
Plate 3 - Fall 2004 to Fall 2009 GWE Change in Wells Over 600 ft in Depth
Plate 4 - Fall 2004 to Fall 2009 GWE Change in Dedicated Observation Wells

 

Summer 2009

Plate 1 - Summer 2008 to Summer 2009 GWE Change in Wells up to 200 ft in depth
Plate 2 - Summer 2008 to Summer 2009 GWE Change in Wells From 200 to 600 ft in depth
Plate 3 - Summer 2008 to Summer 2009 GWE Change in Wells Over 600 ft in depth
Plate 4 - Summer 2008 to Summer 2009 GWE Change in Dedicated Observation Wells

Plate 5 - Summer 2006 to Summer 2009 GWE Change in Wells up to 200 ft in depth
Plate 6 - Summer 2006 to Summer 2009 GWE Change in Wells From 200 to 600 ft in depth
Plate 7 - Summer 2006 to Summer 2009 GWE Change in Wells Over 600 ft in depth
Plate 8 - Summer 2006 to Summer 2009 GWE Change in Dedicated Observation Wells

 

Spring 2009

Groundwater Change Report Spring 2008 to Spring 2009 Sacramento Valley and Redding Basins

Plate 1 - Spring 2008 to Spring 2009 - GWE Change in Wells Up to 200 ft in Depth
Plate 2 - Spring 2008 to Spring 2009 - GWE Change in Wells from 200 to 600 ft in Depth
Plate 3 - Spring 2008 to Spring 2009 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Spring 2008 to Spring 2009 - GWE Change in Dedicated Observation Wells

 

Groundwater Change Report Spring 2006 to Spring 2009-Sacramento Valley and Redding Basins

Plate 1 - Spring 2006 to Spring 2009 GWE Change in Wells Up to 200 ft in depth
Plate 2 - Spring 2006 to Spring 2009 GWE Change in Wells From 200 to 600 ft in depth
Plate 3 - Spring 2006 to Spring 2009 GWE Change in Wells Over 600 ft in depth
Plate 4 - Spring 2006 to Spring 2009 GWE Change in Observation Wells.

 

Fall 2008

Groundwater Change Report Fall 2007 to Fall 2008 - Sacramento Valley and Redding Basins

Plate 1 - Fall 2007 to Fall 2008 - GWE Change in Wells Up to 200 ft. in Depth
Plate 2 - Fall 2007 to Fall 2008 - GWE Change in Wells from 200 to 600 ft. in Depth
Plate 3 - Fall 2007 to Fall 2008 - GWE Change in Wells Over 600 ft in Depth
Plate 4 - Fall 2007 to Fall 2008 - GWE Change Map in Observation Wells

 

Summer 2008

Groundwater Change Report Summer 2007 to Summer 2008 Sacramento Valley and Redding Basins

Plate 1 - Summer 2007 to Summer 2008 GWE Change in Wells Up to 200 ft. in Depth
Plate 2 - Summer 2007 to Summer 2008 - GWE Change in Wells from 200 to 600 ft. in Depth
Plate 3 - Summer 2007 to Summer 2008 - GWE Change in Wells Over 600 ft.in Depth
Plate 4 - Summer 2007 to Summer 2008 - GWE Change Map in Observation Wells

 

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Sacramento Valley Groundwater Contour Maps

Groundwater contour maps have been created that show the approximate groundwater surface elevation using contour lines. Groundwater contour maps have also been created showing the change in groundwater elevation from one time period to another.

 

2017

Spring 2017 Contours

 

2016

Spring 2016 Contours
Spring 2016 Deep Well Contours

 

2015

Fall 2015 Contours
Spring 2015 Contours

 

2014

Spring 2014 Contours

 

2009

Fall 2009 Contours
Fall 2009 Contours with Water Districts

Summer 2009 Contours
Summer 2009 Contours with Water Districts

Spring 2009 Contours
Spring 2009 Contours with Water Districts

Spring 2009 to Summer 2009 Change Contours
Spring 2009 to Summer 2009 Change Contours with Water Districts

 

2008

Fall 2008 Contours
Fall 2008 Contours with Water Districts

Summer 2008 Contours
Summer 2008 Contours with Water Districts

Spring 2008 Contours
Spring 2008 Contours with Water Districts

Spring 2008 to Summer 2008 Change Contours
Spring 2008 to Summer 2008 Change Contours with Water Districts

Spring 2007 to Spring 2008 Change Contours
Spring 2007 to Spring 2008 Change Contours with Water Districts

 

2007

Fall 2007 Contours
Fall 2007 Contours with Water Districts

Summer 2007 Contours
Summer 2007 Contours with Water Districts

Spring 2007 Contours
Spring 2007 Contours with Water Districts

Spring 2007 to Summer 2007 Change Contours
Spring 2007 to Summer 2007 Change Contours with Water Districts

 

2006

Summer 2006 Contours
Summer 2006 Contours with Water Districts

Spring 2006 Contours
Spring 2006 Contours with Water Districts

Spring 2006 to Summer 2006 Change Contours
Spring 2006 to Summer 2006 Change Contours with Water Districts

 

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Sacramento Valley Well Depth Summary Maps

Well depth summary maps have been created that show the approximate depth to water using groundwater contour lines. These maps also show Well Completion Report data that show the minimum, maximum, and average well depths per section for Butte, Colusa, Glenn, and Tehama counties. Additional maps that show the number of wells and well type per section can be accessed by clicking on the Well Completion Report link.

Butte County

Plate 1 - Butte County Domestic Well Depth Summary with Depth to Groundwater Contours for Wells Screened Less Than 150 feet in Depth.

Plate 2 - Butte County Large Production Well Depth Summary with Depth to Groundwater Contours for Wells Screened Greater Than 150 feet in Depth.

Colusa County

Plate 1 - Colusa County Domestic Well Depth Summary with Depth to Groundwater Contours for Wells Screened Less Than 150 feet in Depth.

Plate 2 - Colusa County Large Production Well Depth Summary with Depth to Groundwater Contours for Wells Screened Greater Than 150 feet in Depth.

Glenn County

Plate 1 - Glenn County Domestic Well Depth Summary with Depth to Groundwater Contours for Wells Screened Less Than 150 feet in Depth.

Plate 2 - Glenn County Large Production Well Depth Summary with Depth to Groundwater Contours for Wells Screened Greater Than 150 feet in Depth.

Tehama County

Plate 1 - Tehama County Domestic Well Depth Summary with Depth to Groundwater Contours for Wells Screened Less Than 150 feet in Depth.

Plate 2 - Tehama County Large Production Well Depth Summary with Depth to Groundwater Contours for Wells Screened Greater Than 150 feet in Depth.

Regional Issues

Butte Valley Wildlife Area Well Interference Investigation (PDF: 3.7 MB)
A study conducted by the Department of Water Resources and the Department of Fish and Game in the Butte Valley Wildlife Area to investigate the water resources in the area, investigate the reported well interference, and make recommendations on how to reduce future impacts. (1998)

Ground Water Levels in Butte County (1993) (PDF: 3 MB)
This report summarizes groundwater level data collected in Butte County by DWR through April 1992. The report presents locations of wells, information related to the monitoring program, and hydrographs depicting groundwater levels over time.

Ground Water Levels in Colusa County (1994) (PDF: 4.9 MB)
This report summarizes groundwater level data collected in Colusa County by DWR and the U.S. Bureau of Reclamation since the later 1920s through July 1993. The report presents locations of wells, information related to the monitoring program, and hydrographs depicting groundwater levels over time.

Ground Water Levels in Glenn County (1997) (PDF: 11 MB)
This report summarizes groundwater level data collected in Glen County mostly by DWR since the later 1920s through November 1996. The report presents locations of wells, information related to the monitoring program, and hydrographs depicting groundwater levels over time.

Ground Water Levels in Redding Basin (1996) (PDF: 3 MB)
This report summarizes groundwater level data collected from the Redding groundwater basin by DWR since the mid 1950s through July 1996. The report presents locations of wells, information related to the monitoring program, and hydrographs depicting groundwater levels over time.

Ground Water Levels in Tehama County (1993) (PDF: 6 MB)
This report summarizes groundwater level data collected in Tehama County by DWR since the late 1920s through June 1993. The report presents locations of wells, information related to the monitoring program, and hydrographs depicting groundwater levels over time.

 

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