Reservoirs

 

Seven major stream systems originate in the mountains of San Diego County and drain to the Pacific Ocean. Runoff from these seven watersheds supplies 24 reservoirs that have a combined capacity of about 744,000 acre-feet.

The last major increase in regional water storage capacity was in 2014 when then San Vicente Dam Raise was completed, adding 157,000 acre-feet of capacity. While the region’s reservoirs were built mainly as water supply projects, many of them also provide other benefits such as recreation and flood reduction.

Since the major statewide drought of 1976-1977, annual surface water use from local reservoirs has ranged from 4,100 acre-feet in fiscal year 2015 to 140,300 acre-feet in fiscal year 1984. Over the past two decades, annual local surface water use has averaged approximately 60,000 acre-feet, or about 10 percent of the region’s average total annual water use.

Map of San Diego County Reservoirs

icon_pdf.pngLocal Rainfall and Reservoirs Fact Sheet

Metropolitan Water District of Southern California Reservoirs

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 1 0 (95) 1
Escondido, City of Dixon 2,606 2,516 97 110 83
Escondido, City of Wohlford 2,783 2,474 89 300 56
Fallbrook P.U.D. Red Mountain 1,335 527 39 249 192
Helix W.D. Cuyamaca 8,195 3,331 41 2,631 243
Helix W.D. Jennings 9,790 8,959 92 23 (20)
Poway, City of Poway 3,432 3,330 96 168 22
Rainbow M.W.D. Morro Hill 465 140 30 (92) (49)
Ramona M.W.D. Ramona 12,000 2,943 25 728 49
San Diego County Water Authority Olivenhain 24,774 21,750 88 1,498 386
San Diego, City of Barrett 34,806 16,670 48 4,463 1,750
San Diego, City of El Capitan 112,807 42,486 38 14,694 4,352
San Diego, City of Hodges 30,633 20,685 68 5,330 (169)
San Diego, City of Lower Otay 47,067 39,912 85 3,661 883
San Diego, City of Miramar 6,682 5,507 82 55 14
San Diego, City of Morena 50,694 5,075 10 1,222 596
San Diego, City of Murray 4,684 4,044 86 (31) (77)
San Diego, City of San Vicente 249,358 191,344 77 4,146 9,310
San Diego, City of Sutherland 29,508 10,829 37 (2,699) (803)
San Dieguito W.D. San Dieguito 883 398 45 26 (9)
Sweetwater Authority Loveland 25,400 10,112 40 (3,557) (2,399)
Sweetwater Authority Sweetwater 28,079 16,219 58 8,227 6,361
Valley Center M.W.D. Turner 1,612 1,612 100 412 0
Vista I.D. Henshaw 51,774 17,599 34 13,220 2,648
Totals   739,967 428,432 58 54,688 23,419

Date generated: 3/26/2019

Note: Each reservoir’s change in storage level is a function of its unique operational characteristics, which may include movement of imported and local water supplies in and out of the reservoir as well as surface water capture from local rainfall.