California EPA
California State Water Resources Control Board
California Department of Water Resources (DWR)
California Branch of the USGS
California/Nevada Groundwater Atlas (USGS)
Groundwater Level Maps for the San Joaquin Valley (DWR)
Map of California Watersheds (Bay-Delta Authority)
Groundwater Level Data (DWR)
Groundwater Programs (DWR)
Statewide Groundwater Planning (Bulletin 118) (DWR)
Statewide Groundwater Ambient Monitoring and Assessment Program (SWRCB)
California Porter-Cologne Water Quality Control Act
California Well Standards and Monitoring Well Standards (DWR)
Wellhead Protection for Chemigation (DPR)
California Irrigation Management Information System (CIMIS)(DWR)
WaterTox: Computing water-related risk of pesticide applications (UCD IPM)
California Department of Health, Division of Drinking Water & Environment
California DHS, Water Quality Data (maximum contamination levels, MTBE, Perchlorate, etc.)
California DHS, Safe Drinking Water Act
California Certified Environmental Analytical Laboratories
Bureau of Reclamation, Sacramento Office
CALFED Bay-Delta Program
CEQA (California Environmental Quality Act) internet resources
Water Education Foundation
Association of California Water Agencies
Groundwater Resources Association of California
California Ground Water Association
California Rural Water Association
 Association of Ground Water Agencies
Links to California Water Districts and Associations
California Water Photos (Dept. of Water Resources)
California Water Law (brief overview)
California Water Awareness Campaign
PBS Television Series on "California's Water"
On-Line Soil Survey Data, California Soil Resource Lab
California Water and Environmental Modeling Forum