SGMA in the Cosumnes Subbasin


UPCOMING MEETING: Online public meeting scheduled for August 5, 6:30-8:00p.   

To Join the Meeting, Register: 

Main Meeting MaterialsAgenda | Cosumnes SGMA Fact Sheet | Presentation Slides (Full Resolution, Lower Resolution)

Supplemental technical information:  Technical Memo #6 (TM6) 
(The meeting will present information from TM6, but it is not necessary to read beforehand)


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Note: Pursuant to the Governor’s Executive Order N-29-20, and given the state of emergency regarding the threat of COVID-19, the public meeting will be held via teleconference. We will use Zoom to share presentation slides and other information during the meeting.

Zoom Meeting Tips:

  • Join Early. We encourage members and participants to join the meeting 10 minutes early.
  • One Audio Source. Please make sure you are using only one audio source (either computer or phone).
  • Headset or Mic. Use a headset or a microphone that plugs into your computer for clearer sound quality.
More questions about Zoom? Refer to our Zoom Guide – [View]

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.

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.