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 February 13, 2017

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 529 88 351 284
Escondido, City of Dixon 2,606 2,245 86 (34) (21)
Escondido, City of Wohlford 6,506 2,334 36 280 (56)
Fallbrook P.U.D. Red Mountain 1,335 436 33 24 21
Helix W.D. Cuyamaca 8,195 3,748 46 3,001 2,654
Helix W.D. Jennings 9,790 8,901 91 637 762
Poway, City of Poway 3,330 3,030 91 282 24
Rainbow M.W.D. Morro Hill 465 415 89 235 218
Ramona M.W.D. Ramona 12,000 2,668 22 86 125
San Diego County Water Authority Olivenhain 24,375 18,861 77 (3,019) (185)
San Diego, City of Barrett 34,806 5,771 17 3,664 3,835
San Diego, City of El Capitan 112,807 35,321 31 5,387 11,380
San Diego, City of Hodges 30,633 16,612 54 4,578 3,275
San Diego, City of Lower Otay 49,849 42,847 86 5,967 4,876
San Diego, City of Miramar 6,682 5,424 81 361 716
San Diego, City of Morena 50,694 2,061 4 647 968
San Diego, City of Murray 4,684 4,106 88 54 (46)
San Diego, City of San Vicente 249,358 184,216 74 22,213 436
San Diego, City of Sutherland 29,508 6,086 21 3,647 3,859
San Dieguito W.D. San Dieguito 883 491 56 127 193
Sweetwater Authority Loveland 25,400 13,447 53 5,883 6,173
Sweetwater Authority Sweetwater 28,079 6,013 21 2,567 2,748
Valley Center M.W.D. Turner 1,612 1,388 86 363 325
Vista I.D. Henshaw 51,774 9,380 18 4,394 5,406
Totals   745,971 376,330 50 61,694 47,969

Date generated: 02/14/2017

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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