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Please see the RECENT POSTS (in the column on the right) for the latest CGA information!

WEBINAR: Please join us on Monday, June 24, 2024, at 12 noon for this one-hour presentation. (To view the meeting link, please open or download the flyer below.)

Colusa Subbasin Webinar Outreach Flyer 20240624Download

AVAILABLE NOW: Colusa Subbasin Groundwater Conditions in Water Year 2023 — a summary of the information in our Annual Report.

Colusa Subbasin Groundwater Conditions WY 23 6.17.24Download

REVISED DRAFT GROUNDWATER SUSTAINABILITY PLAN NOW AVAILABLE FOR REVIEW

In October 2023, the state Department of Water Resources gave the Colusa Subbasin GSP an “incomplete” determination and identified several areas for correction. The Colusa Groundwater Authority and the Glenn Groundwater Authority have developed revisions to the GSP to address the items identified by DWR and will jointly meet on April 19, 2024, to consider adoption of the REVISED GSP FOR THE COLUSA SUBBASIN.

Click HERE to review the Revised GSP for the Colusa Subbasin.

Colusa Groundwater Authority is considering a new fee structure to support implementation of our Groundwater Sustainability Plan. If you missed our recent public workshops, click here to see the presentation and learn more about CGA’s proposed fees.

CGA GSA Public WorkshopDownload

To view data on groundwater conditions in the Colusa Subbasin, go to DWR’s data viewer: https://sgma.water.ca.gov/sgmadataviewer#landsub.

Water Year 2023 Colusa Subbasin Annual Report Now Available!

The final Colusa Subbasin Annual Report for Water Year 2023 has been submitted to the state Department of Water Resources and is available for review HERE.

Upcoming Meetings

Visit the Agendas and Minutes 2024 Page of this website for more information.

Drought Resources

Please visit the following County of Colusa webpage for local drought information and assistance programs: Water Resources | Colusa County, CA – Official Website (countyofcolusa.org)

PUBLIC WORKSHOPS ABOUT THE DRAFT GROUNDWATER SUSTAINBILITY PLAN

SGMA Series Public Workshops were held on October 13 (Virtual) and October 15 (In- erson) to introduce the draft Groundwater Sustainability Plan for the Colusa Subbasin. Click on the links below for more information:
Flyer (English) | Flyer (Spanish)| Press Release
Agenda (10/13/2021) | Agenda (10/15/2021)
PRESENTATION

PUBLIC WORKSHOPS ON SUSTAINABLE GROUNDWATER REGULATION AND DRAFT CHAPTERS 5 AND 6 OF THE COLUSA SUBBASIN GROUNDWATER SUSTAINABILITY PLAN

July 28, 2021 (virtual meeting) – 6:00-8:00 p.m. Click HERE to view a recording of this meeting
July 29, 2021 (in-person meeting) – 6:00 p.m.-8:00 p.m.
Sites Project Office, 122 Old Highway 99, Maxwell, CA

Click the links below for more information about these important meetings:
– Meeting Agenda
– Meeting Presentation
– Press Release
– Flyer (English)
– Flyer (Spanish)

PUBLIC WORKSHOPS ON SUSTAINABLE GROUNDWATER REGULATION AND DRAFT CHAPTERS 1 THROUGH 4 OF THE COLUSA SUBBASIN GROUNDWATER SUSTAINABILITY PLAN
December 9, 2020 at 5:30 p.m. and December 10, 2020 at 1:00 p.m.
If you missed these public workshops, recordings are available on the Colusa Subbasin SGMA facebook page.

Click the links below for more information about these important meetings:

Welcome to the Colusa Groundwater Authority (CGA) website.

The Colusa Groundwater Authority is the Groundwater Sustainability Agency (GSA) for the Colusa County portions of the groundwater basins that are subject to the Sustainable Groundwater Management Act (SGMA).

Two groundwater sub-basins in Colusa County are subject to SGMA:

  • Colusa subbasin (5-021.52) which spans portions of Colusa and Glenn Counties
  • Butte subbasin (5-21.70) which spans portions of Colusa, Glenn and Butte Counties

For an interactive map and more information about groundwater basins, visit the DWR Groundwater Basin Boundary Assessment Tool (BBAT)

We hope you will explore this website to learn more about SGMA and the Colusa Groundwater Authority, and check back often for updates.

Website Structure

  • About Page: Find information about the CGA Board
  • SGMA Page: Find information about the Sustainable Groundwater Management Act
  • Meetings Page: Find information about the CGA’s meeting schedule
  • Projects Page: Learn about local groundwater projects and studies
    • Groundwater Sustainability Plan: Find information about Groundwater Sustainability Plan development in the Colusa and West Butte Subbasins, and other surrounding basins
    • Basin Boundary Modification: Find information about the CGA’s 2018 Basin Boundary Modification in portions of the Colusa and West Butte/Butte Subbasins
    • RFPs: Find any current Requests for Proposals from the CGA
  • Public Outreach Page: View/download CGA Newsletters and other outreach publications and discover opportunities to engage in public outreach activities
  • Butte Subbasin Page: Learn about SGMA implementation efforts in the Butte Subbasin.
  • Contact Us Page: Sign up to receive news and updates, and/or leave questions or comments for the CGA
  • Events Calendar: Check the calendar for upcoming meetings, workshops and other local water-related events