Santa Rosa Valley – Santa Rosa Plain



Located in California’s North Coast hydrologic region, the Santa Rosa Valley – Santa Rosa Plain is 80,124 acres in size. This High priority basin is home to an estimated 250,016 people (2010 value), which have been at a rate of 16.95.

Santa Rosa Valley – Santa Rosa Plain is a(n) basin with approximately 6943 wells, of which approximately 158 are water supply wells. Groundwater accounts for approximately 50.03 percent of the basin’s water supply.

Source: CA DWR
Source: CA DWR

Basin Notes

2003Bulletin 118 basin description

Sonoma County Water Agency

2014: Santa Rosa Plain Watershed Groundwater Management Plan

May 2018: basin proposed for high priority status

2019: basin boundary modification approved changing a portion of the e boundary between the Santa Rosa Plain subbasin and the Wilson Grove Formation Highlands basin consolidating the City of Sebastopol, Belmont Terrace Mutual Water Company (MWC), Fircrest MWC, and Kelly MWC within the Santa Rosa Plain subbasin.  Phase 2 Draft basin priority: medium.