Omochumne - Hartnell Water District
Servicing the Community of the Cosumnes River

The Cosumnes Basin is located in the southern part of Sacramento County south of the Cosumnes River to the Sacramento County Line.  It also includes some westerly portions of Amador County.  It consists of 7 Groundwater Sustainability Agencies.

For more information please visit:


Online Public Meeting

How can we manage our local groundwater sustainably in the Cosumnes Subbasin?

Wednesday, August 5, 2020


The Cosumnes Subbasin Working Group, on behalf of the seven Groundwater Sustainability Agencies in the basin, will hold an online public meeting on August 5, 2020, 6:30-8:00.   This meeting will focus on:

How to Participate – Please register at this link:

This workshop is presented on behalf of the Cosumnes Subbasin Working Group representing the Groundwater Sustainability Agencies within the Cosumnes Subbasin:

Find your GSA by clicking the link below

Fact Sheet about the Sustainable Groundwater Management Act and its implementation in the Cosumnes Basin. 

Link to California Department of Water Resources information page on the Sustainable Groundwater Management Act