Wolfram Data Repository
Immediate Computable Access to Curated Contributed Data
Dataset of seasonal and long-term groundwater level measurements in groundwater basins in California
Monthly reports of the larger urban water suppliers in California on water production and conservation activities, from the State of California's Drinking Water Information Clearinghouse (DRINC)
Dataset of agricultural land use and irrigated acres in California
The American Presidency Project (americanpresidency.org), was established in 1999 as a collaboration between John T. Woolley & Gerhard Peters at the University of California, Santa Barbara.