SGMA in the Cosumnes Subbasin


Cosumnes Subbasin Online Public Meeting

March 24, 2021 | 6:30p

Now is a critical time to get involved in the groundwater management plan for the Cosumnes Subbasin!

The local Groundwater Sustainability Agencies (GSAs) will provide an update of their plan for managing groundwater in the Cosumnes Subbasin at a virtual public workshop in late March. The meeting will be an opportunity for residents, including those who rely on wells for their water, to understand and comment on proposals that will govern how groundwater is used for the next two decades in the Cosumnes watershed.

Register today and help spread the word!

To Register: 

Virtual Meeting Technical Assistance – New to online Zoom webinars? Questions about participating in the online meeting? Contact 

Upcoming Public Workshops

March 24  |  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.