DWR’s Groundwater Information Center – A good example of an anaylsis tools, where you can zoom in and see the effect at Hungry Hollow, Zamora, and Conaway, etc.
https://gis.water.ca.gov/app/gicima/ (But unfortunately, the Cities’ well data was prohibited to be included until recently, so the results need to consider
http://wrid.facilitiesmap.com/ has raw groundwater data for Yolo County. Good for engineers, probably not what most people want.
A great regional analysis of long term trends in groundwater use and status is here: