SGMA in the Cosumnes Subbasin


Share Your Input | Stay involved!

Projects and Management Actions Info & Survey 

Save the Date! May 26 
Next workshop is scheduled for May 26. Register, save the date, and spread the word!

Cosumnes Subbasin Public Meeting 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. 

Meeting Materials

Upcoming Public Workshops

May 2021  |  Summer 2021

Stay Tuned! – Additional workshops planned for May 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.