Water Supply Information

• This week's water supply update
• Recent water supply forecasts, current snowpack conditions, and precipitation totals
• Actual and unimpaired river flows; storage in major reservoirs
• Historic water supply indicies
  (As specified by SWRCB D-1485, the Sacramento 40-30-30, San Joaquin 60-20-20, and the Four-River Index [formerly known as SRI])

• Information about our data collection infrastructure, including how manual snow surveys are made
• Depth and density explanation