1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
April 03, 2023
April 03, 2023 Reservoir Storage
Reservoir
Current
Storage1,2,3
Maximum
Storage4
Available
Capacity
Percent of
Maximum
Storage
Normal
Percent of
Maximum
Storage5
(AF) (AF) (AF)
Tuolumne System
Hetch Hetchy 239,900 360,360 120,460 66.6% 61.1%
Cherry 179,700 273,345 93,645 65.7% -
Eleanor 15,520 27,100 11,580 57.3% -
Water Bank 570,000 570,000 0 100.0% 99.7%
Total Tuolumne Storage 1,005,120 1,230,805 225,685 81.7% - Local System
Calaveras 96,834 96,670 0 100.0% -
San Antonio 53,380 53,266 0 100.0% -
Crystal Springs 56,573 68,953 12,380 82.0% -
San Andreas 16,715 18,572 1,857 90.0% -
Pilarcitos 2,896 3,125 229 92.7% -
Total Local Storage 226,398 240,586 14,466 94.1% -
Total System Storage 1,231,518 1,471,391 240,151 83.7% 80.5% Total without water bank 661,518 901,391 240,151 73.4% -
1 Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
April 2, 2023
Avg Annual Total: 36.68 inches
YTD Total: 58.71 inches
Bay Area 7-station Precipitation Index
as of April 2, 2023
Avg Annual Total: 22.80 inches
YTD Total: 42.54 inches
Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
National Precipitation Forecast
Total Deliveries
Governor Newsom’s March 24th Executive Order
• On March 24, 2023, Governor Newsom issued Executive Order N-5-23 in light of improving drought conditions.
• The State Emergency Drought Declaration Continues… with 33 EO provisions remaining operative.
• Eliminated Governor’s directive for Stage 2 of Water Shortage Contingency Plans 13 SWRCB April 4th Curtailment Action
• On April 4, SWRCB rescinded, effective immediately, all orders imposing water right curtailment and reporting requirements (curtailment and reporting orders) issued pursuant to the emergency curtailment and reporting regulation for the Sacramento-San Joaquin Delta (Delta) watershed (Cal. Code Regs., tit. 23, § 876.1 et seq.). • “Following the Governor’s recent Executive Order (N-5-23), and in consideration of reservoir storage conditions and continued precipitation throughout the Delta watershed, the curtailment and reporting orders are no longer needed.”
14