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 746,000 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 January 17, 2017

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 245 41 141 40
Escondido, City of Dixon 2,606 2,266 87 (222) (188)
Escondido, City of Wohlford 6,506 2,390 37 98 0
Fallbrook P.U.D. Red Mountain 1,335 416 31 14 20
Helix W.D. Cuyamaca 8,195 1,095 13 478 507
Helix W.D. Jennings 9,790 8,138 83 (1,010) (752)
Poway, City of Poway 3,330 3,006 90 151 (102)
Rainbow M.W.D. Morro Hill 465 197 42 65 80
Ramona M.W.D. Ramona 12,000 2,544 21 (72) 26
San Diego County Water Authority Olivenhain 24,375 19,046 78 (2,760) 168
San Diego, City of Barrett 34,806 1,937 6 (84) 103
San Diego, City of El Capitan 112,807 23,941 21 (6,993) 635
San Diego, City of Hodges 30,633 13,338 44 693 1,243
San Diego, City of Lower Otay 49,849 37,971 76 365 456
San Diego, City of Miramar 6,682 4,708 70 (743) (897)
San Diego, City of Morena 50,694 1,092 2 (302) 66
San Diego, City of Murray 4,684 4,152 89 31 85
San Diego, City of San Vicente 249,358 183,779 74 19,723 (1,528)
San Diego, City of Sutherland 29,508 2,227 8 (127) 123
San Dieguito W.D. San Dieguito 883 298 34 (57) (69)
Sweetwater Authority Loveland 25,400 7,274 29 (260) 338
Sweetwater Authority Sweetwater 28,079 3,264 12 (165) 438
Valley Center M.W.D. Turner 1,612 1,063 66 38 0
Vista I.D. Henshaw 51,774 3,974 8 (420) 788
Totals   745,971 328,360 44 8,582 1,578

Date generated: 01/19/2017

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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