Monitoring Groundwater in Sacramento County

October 12, 2018

The South American Subbasin is located in the central portion of Sacramento County. It is primarily managed by the Sacramento Central Groundwater Authority (SCGA).

ECOS believes that Sacramento Central Groundwater Authority’s understanding of the hydrology of the Subbasin should be measurably improved, and we have written a letter suggesting some ways to achieve that. Below is an excerpt of our letter.

The Environmental Council of Sacramento (ECOS) notes with interest the Sacramento Central Groundwater Authority (SCGA) Board’s September 12, 2018 direction to Staff to evaluate the State of California’s C2VSimFG model input data for the South American Subbasin (Subbasin) and update the State’s model data as necessary. We believe that SCGA’s understanding of the hydrology of the Subbasin should be measurably improved. SCGA should look to the modeling and monitory efforts underway by the Regional Water Authority and the Sacramento Groundwater Authority (SGA), and adopt and put in place a comprehensive and compatible monitoring program for the Subbasin.

We also believe the Board acted with imprudence when it recently adopted its operating budget for the upcoming year, in that, among other issues, the Board did not provide enough funding for groundwater monitoring and modeling. SCGA’s existing set of monitoring wells is insufficient to provide a full understanding of the flows of groundwater into, through and out of the Subbasin. Semiannual data points are not sufficient to understand and effectively manage the Subbasin. While we commend SCGA’s recent effort to provide real time monitoring in a small, select group of wells, we believe you should do far more in this important area.

Click here to read the full letter (PDF).

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