Groundwater Information

Groundwater Levels

The California Department of Water Resources (DWR) produces Groundwater Level Change maps which summarize the change in groundwater level measurements over time. Groundwater level data are collected from wells in the northern Sacramento Valley by DWR Northern Region Office Staff and local cooperating entities. Groundwater levels are measured seasonally as part of DWR’s ongoing data collection program.

Visit DWR’s website here: Northern Sacramento Valley Groundwater Elevation Change Maps Website


February 12, 2020
Colusa Groundwater Authority Meeting
Groundwater Update, Erin Smith, DWR Northern Region Office
Presentation (PDF)

January 24, 2018
Colusa Groundwater Authority Meeting
Groundwater Conditions, Roy Hull, DWR Northern Region Office
Presentation (PDF)

July 15, 2016
SGMA Governance Workgroup Meeting Number 5
Groundwater Conditions Related to GSP Regulations - Grant Davids, Davids Engineering, Inc.
Presentation (PDF)

June 16, 2016
Groundwater Commission Meeting
Groundwater Conditions, Monitoring Wells - Roy Hull, DWR Northern Region Office
Presentation (PDF)

January 19, 2016
Davids Engineering, Inc., Colusa County Groundwater Assessment
Presentation (PDF)

January 11, 2016
Public Meeting on the Sustainable Groundwater Management Act 
Agenda (PDF) | Presentation (PDF)

May 12, 2015
Groundwater Public Outreach Meeting 

Presentations from past Groundwater Commission meetings:

Northern Sacramento Valley Groundwater Newsletter Series

These informative newsletters were developed by the University of California Cooperative Extension in cooperation with the California Department of Water Resources, Northern District. They were published from April, 2003 through July, 2004 and funded by the Renewable Resources Extension Act.

The following newsletters were published beginning in September, 2005 through 2006, and funded by the Four County Drinking Water Qualtiy Program.