About 30% of the irrigated lands of California receive their entire water supply from ground water and about three quarters of the cities, towns, water, and sewage districts in the state draw all or part of their requirements from the same source.

The first of the Giannini Foundation Ground Water Studies, “Ground Water in California- the Present State of Our Knowledge,” may be obtained without cost by addressing the Agricultural Information Office, 22 Giannini Hall, University of California, Berkeley 4, California.