SGMA in the Cosumnes Subbasin


MEETING ANNOUNCEMENT: Next Public Workshops – June 2nd and 3rd

The May 26th and 27th public workshops have been rescheduled to June 2nd and June 3rd, 2021.

The meeting will focus on Groundwater Sustainability Plan (GSP) implementation and financing. The meeting is an opportunity for South Sacramento County and Western Amador County residents to understand and comment on the Cosumnes Subbasin Groundwater Sustainability Plan and the fees associated with implementing the plan. More than half of the workshop time is set aside for participants to ask questions, provide feedback and suggest alternatives to the projects and actions under consideration. Staff who are knowledgeable about the plan proposal will be available at both events to answer questions.

The workshop will be conducted virtually on June 2, 2021 from 6:30 to 8 p.m., and in person on June 3, 2021 from 6:30 to 8 p.m. at the Herald Fire Station. Face masks, social distancing and other Covid-19 protection practices will be enforced for the in-person meetings.

Register, save the date, and spread the word!

WEBINAR: Register for the June 2nd online webinar

IN-PERSON: Register for the June 3rd in-person workshop
(Herald Fire Station) 

Cosumnes Subbasin Public Workshop Materials Posted

March 24, 2021 | 6:30p

Thank you to the many attendees who participated in the March 24 public workshop!

Participants learned about potential projects and actions, associated costs, and how participants can be involved in the next steps for developing a groundwater sustainability plan for the subbasin. This meeting was also simulcasted online and at two in-person locations — Herald Fire Station and Rancho Murieta Country Club. 

Upcoming Public Workshops

June 2021  |  Summer 2021

Stay Tuned! – Additional workshops planned for June and summer 2021. Specific dates and locations are TBD. 

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New to SGMA? Check out these helpful resources:

SGMA in the Cosumnes Subbasin

Under California law, the Sustainable Groundwater Management Act (SGMA) requires the Cosumnes Subbasin to form a groundwater sustainability agency or agencies (GSAs) by June 30, 2017, and to have a groundwater sustainability plan (GSP) in place by 2022.

The following seven agencies filed with the state to form a GSA within the Cosumnes Subbasin:

  • Omochumne-Hartnell Water District (link)
  • Sloughhouse Resource Conservation District (link)
  • Galt Irrigation District (link)
  • Clay Water District (link)
  • City of Galt (link)
  • Amador County Groundwater Management Authority (link)
  • Sacramento County (link)

These GSAs are now engaged in a collaborative group, called the Cosumnes Subbasin SGMA Working Group, to discuss developing a roadmap for creating a groundwater sustainability plan.

Learn how you can contact your local GSA Representative

Note: Elk Grove is in the South American Subbasin — not the Cosumnes Subbasin — and Sacramento Central Groundwater Authority (SCGA) is your local groundwater sustainability agency. For more information about SGMA in the South American Subbasin, visit the SCGA website at

Stakeholder Outreach + Engagement

The Working Group developed a plan to work closely with affected stakeholders including agriculture, environmental interests, rural residential well owners, tribal interests, and others. The GSAs recognize the importance of engaging stakeholders and the broader public in discussions related to groundwater sustainability plan development and implementation and commit to leading a transparent and inclusive process to foster the consideration of the beneficial uses and users of groundwater in the basin. View the Outreach and Public Engagement Plan.

Cosumnes Subbasin Resources

Click on the images below to view/download materials

Additional Resources