California Irrigation Management Information System (CIMIS)
California Department of Water Resources

California Native Plant Link Exchange

A Guide to Estimating Irrigation Water Needs of Landscape Plantings in California
University of California Cooperative Extension and California Department of Water Resources

Irrigation and Training Research Center
California Polytechnic State University, San Luis Obispo

The Metropolitan Water District of Southern California

Model Water Efficient Landscape Ordinance
California Department of Water Resources

UC Agricultural and Natural Resources County Offices

Water Use Efficiency
California Department of Water Resources.

Xeriscape Colorado
Colorado WaterWise