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 743,000 acre-feet.

 

The last major increase in regional water storage capacity was in 2014 when then San Vicente Dam Raise was completed, adding 152,000 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

Local reservoir storage, in acre-feet, for Water Authority member agencies - As of February 27, 2017

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 286 48 43 (119)
Escondido, City of Dixon 2,606 2,345 90 (13) 126
Escondido, City of Wohlford 6,506 2,114 32 72 (248)
Fallbrook P.U.D. Red Mountain 1,335 443 33 24 14
Helix W.D. Cuyamaca 8,195 3,605 44 2,857 347
Helix W.D. Jennings 9,790 8,984 92 290 600
Poway, City of Poway 3,330 3,072 92 331 72
Rainbow M.W.D. Morro Hill 465 371 80 251 52
Ramona M.W.D. Ramona 12,000 2,688 22 170 47
San Diego County Water Authority Olivenhain 24,375 19,659 81 (2,091) 495
San Diego, City of Barrett 34,806 6,993 20 4,880 1,733
San Diego, City of El Capitan 112,807 36,814 33 7,161 4,198
San Diego, City of Hodges 30,633 17,317 57 5,638 1,286
San Diego, City of Lower Otay 47,067 43,907 93 7,477 2,016
San Diego, City of Miramar 6,682 5,649 85 252 211
San Diego, City of Morena 50,694 2,405 5 1,011 459
San Diego, City of Murray 4,684 4,106 88 87 23
San Diego, City of San Vicente 249,358 183,125 73 21,122 (2,837)
San Diego, City of Sutherland 29,508 6,899 23 4,448 1,888
San Dieguito W.D. San Dieguito 883 340 38 (28) (76)
Sweetwater Authority Loveland 25,400 14,661 58 7,107 2,466
Sweetwater Authority Sweetwater 28,079 7,267 26 3,826 2,302
Valley Center M.W.D. Turner 1,612 1,563 97 538 176
Vista I.D. Henshaw 51,774 10,001 19 4,885 1,423
Totals   743,189 384,612 52 70,337 16,653

Date generated: 02/27/2017

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.
 

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