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Sustainable Groundwater Management Act (SGMA)
About SGMA

The Sustainable Groundwater Management Act gives local public agencies (counties, cities, water agencies, PUDs) authority to manage groundwater locally, with State oversight. All high and medium priority groundwater basins must be managed under a Groundwater Sustainability Plan (GSP). The first step in the process is for the eligible local agencies to determine the make-up of the governance structure(s) in their groundwater basins. The governance agencies, known as Groundwater Sustainability Agencies (GSAs) can be a single entity managing an entire basin or a combination of Agencies.

In Colusa County, we have two groundwater basins that are subject to SGMA - the Colusa subbasin which, after basin boundary modifications have taken place, spans portions of Colusa and Glenn Counties, and the West Butte subbasin which spans portions of Colusa, Glenn and Butte Counties. As is required by the Act, Colusa County is communicating with our neighboring counties and eligible local agencies in the two basins to determine the best governance structure for our area. GSAs must be formed in all high and medium priority groundwater basins by June 30, 2017.

GSA Interactive Map

SGMA Timeline

SGMA Portal This portal allows local agencies, groundwater sustainability agencies (GSAs), and watermasters to submit, modify, and view the information required by the Sustainable Groundwater Management Act (SGMA), and enables the public and interested stakeholders to view submitted information and provide comments, where applicable.

Click on the links below to view articles informational articles on SGMA from the local newspapers:

September 14, 2016 Colusa County SGMA Update
August 1, 2016 SGMA Implementation in Colusa County
July 25, 2016 GSAs, GSPs and PPAC
July 11, 2016 What is SGMA


Local SGMA Planning and Implementation

Colusa County is working with other local agencies and stakeholders on a proactive approach to SGMA implementation. The County wants to be part of a partnership that implements SGMA the right way, ensures that we are regional and statewide leaders, and keeps our citizens ahead of the curve on groundwater management policies. County efforts to advance local SGMA implementation include:
  • Engaged with State officials in the early stages of legislation development
  • Applied for and received funding for Facilitation Support Services from the Department of Water Resources
  • Conducts ongoing outreach with local agencies and surrounding counties
  • Conducts ongoing public outreach, including informational public meetings
  • Funded a local groundwater study by Davids' Engineering, Inc. to gain a better understanding of local groundwater conditions, and shared this study with other local agencies and the public - view the presentation.
  • Applied for and received grant funding from Proposition 1 to develop a comprehensive county-wide groundwater monitoring and data management program that will be integrated into a local Groundwater Sustainability Plan
  • Dedicated Water Resources Staff to coordinate local SGMA Governance planning, SGMA implementation efforts and outreach activities
  • Developed a Private Pumper Advisory Committee to ensure that private pumpers are well represented in local SGMA planning and implementation efforts

Although individual landowners are not eligible to be a GSA, it is important that they stay informed and engaged in the planning process. It is especially important for groundwater users that are not part of a water district (private pumpers) to participate in SGMA planning. All beneficial uses and users of groundwater (Water Code Section 10723.2) must be taken into consideration during SGMA planning and implementation. There will continue to be ample opportunities for public engagement during development of Groundwater Sustainability Plans. If you are not on the County's SGMA email list, please contact Water Resources staff.

While we work within Colusa County political boundaries on SGMA planning, Staff continues to communicate planning activities with Yolo County, Glenn County, and each of the other four counties involved in the Northern Sacramento Valley IRWM region (Butte, Tehama, Shasta, Sutter). 
Below you can find information and presentations from past meetings, as well as information on upcoming local meetings regarding SGMA.


SGMA Meetings and Meeting Materials


August 7, 2017
First meeting of the Colusa Groundwater Authority

9:00 a.m. - noon
Colusa Industrial Properties
100 Sunrise Blvd., Colusa, CA 95932


June 20, 2017
GSA Workgroup Meeting #21
Agenda | Presentation: EDF | Presentation: Davids Engineering | Meeting Summary

This Meeting was Cancelled
June 9, 2017
GSA Workgroup Meeting #20

May 23, 2017
GSA Workgroup Meeting #19 
Agenda |
Meeting Summary

May 5, 2017
GSA Workgroup Meeting #18

Agenda | Draft Joint Powers Agreement CLEAN | Final Draft Joint Powers Agreement REDLINE | Meeting Summary

April 21, 2017
GSA Workgroup Meeting #17

Agenda | Draft Joint Powers Agreement | Draft Dispute Resolution | Meeting Summary 

This meeting was cancelled

April 7, 2017
GSA Workgroup Meeting #16

March 23, 2017
GSA Workgroup Meeting #15
Agenda | Handout - Draft JPA | Meeting Summary

March 21, 2017
Legal Review Subcommittee Meeting #2
Agenda | Meeting Summary

This meeting was cancelled:
March 9, 2017
GSA Workgroup Meeting #14

March 8, 2017
Joint Colusa-Glenn GSA Workgroup Meeting #1
Agenda | Meeting Summary

February 23, 2017
GSA Workgroup Meeting #13
Agenda | Meeting Summary

February 9, 2017
GSA Workgroup Meeting #12
| Meeting Summary

January 27, 2017

GSA Workgroup Meeting #11

| Meeting Summary

January 17, 2017
Legal Review Subcommittee Meeting#1
Agenda | Meeting Summary

December 16, 2016
Governance Workgroup Meeting #10
Agenda | Meeting Summary

December 6, 2016
Governance Subcommittee Meeting #4
Agenda Packet | Meeting Summary

November 16, 2016
Governance Workgroup Meeting #9
Agenda | Back-up Materials | Meeting Summary

October 25, 2016, 9:00-noon
Governance Workgroup Meeting #8
Agenda | Meeting Summary

October 11, 2016
Governance Subcommittee Meeting #3

Agenda | Presentation (Surface Water District Draft Principles) | Meeting Summary

September 27, 2016
GSA Workgroup Meeting #7

Agenda | Meeting Summary

September 15, 2016
GSA Workgroup Subcommittee Meeting #2

AgendaPresentation (PPAC) | Meeting Summary

August 24, 2016
GSA Workgroup Meeting #6
Agenda | Meeting Summary

August 12, 2016
GSA Workgroup Subcommittee Meeting #1

Agenda | Meeting Summary

July 15, 2016
GSA Workgroup Meeting #5

Presentation (Grant Davids) | Contour Maps | LIA White Paper |
Meeting Summary

April 28, 2016
GSA Workgroup Meeting #4

Agenda |
Presentation L.I.A. - Updated | Meeting Summary

March 29, 2016
GSA Workgroup Meeting #3

Agenda | Presentation L.I.A. | Presentation GSA Roles | Meeting Summary

February 25, 2016
GSA Workgroup Group Meeting #2

Agenda | Presentation: Draft GSP Regs | Presentation: Governance | Meeting Summary

January 19, 2016
GSA Workgroup Group Meeting #1
Agenda | Presentation | Common Principles (Draft) | Meeting Summary



January 11, 2016
Public Meeting
Informational meeting for the public regarding SGMA.
Agenda | Presentation | Meeting Notes


The PPAC is made up of members representing the "white areas" of Colusa County. These are groundwater-dependent areas of the county that are not covered by a water agency, or other GSA-eligible agency. PPAC members were chosen by the Colusa County Groundwater Commission.

Private Pumper Advisory Committee

January 12, 2017
10:00 a.m. - noon
| Meeting Summary

October 3, 2016
| Meeting Summary

August 26, 2016
10:00 a.m. - noon
Agenda | Meeting Summary

June 22, 2016
10:00 a.m. - noon
Agenda | Meeting Summary

April 21, 2016
10:00 a.m. - noon
Agenda | Meeting Summary


Colusa GSA Workgroup Documents
The Colusa County GSA Workgroup has finalized the Joint Exercise of Powers Agreement Establishing the Colusa Groundwater Authority (5/11/2017)

The agencies forming the Colusa Groundwater Authority will be holding public hearings in May and June to consider the adoption of a resolution approving the Joint Exercise of Powers Agreement Establishing the Colusa Groundwater Authority. The notice is scheduled to run in the Colusa Sun Herald Newspaper May 17, 2017 and May 24, 2017.

Model Collaborative Decision-Making Approach, White Paper

Critical Path Timeline, updated February 9, 2017

Draft SGMA Work Plan

Draft Memorandum of Agreement (MOA), updated February 23, 2017

Draft Cost Estimate Worksheet (February 23, 2017)

Draft Funding Proposal (February 23, 2017)

Helpful Information
GSP Regulations, Plan Contents, presentation by Bill Ehorn, DWR Northern Region Office

GSP Emergency Regulations
The California Water Commission approved the GSP Regulations presented by DWR at their May 18, 2016 meeting.

Domestic Well Users and SGMA Brochure from DWR and SWRCB

SGMA Legislation with 2015 Amendments

Designing Effective Groundwater Sustainability Agencies (UC Berkeley School of Law)
Executive Summary

Groundwater Sustainability Agency (GSA) Frequently Asked Questions

CA Department of Water Resources (DWR)
Sustainable Groundwater Management information:

Association of California Water Agencies (ACWA)
ACWA has prepared several resources including a fact sheet, FAQ, and implementation schedule to help member agencies understand the provisions of the new law as implementation moves forward: