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 April 18, 2016

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Two Weeks Ago (AF)
Carlsbad M.W.D. Maerkle 600 46 8 (148) (42)
Escondido, City of Dixon 2,606 2,339 90 (20) 7
Escondido, City of Wohlford 6,506 2,018 31 60 (12)
Fallbrook P.U.D. Red Mountain 1,335 436 33 (250) 0
Helix W.D. Cuyamaca 8,195 811 10 373 32
Helix W.D. Jennings 9,790 8,799 90 (201) 32
Poway, City of Poway 3,330 3,012 90 198 138
Rainbow M.W.D. Morro Hill 465 124 27 43 43
Ramona M.W.D. Ramona 12,000 2,479 21 70 (13)
San Diego County Water Authority Olivenhain 24,789 20,983 85 (399) (399)
San Diego, City of Barrett 34,806 2,160 6 202 12
San Diego, City of El Capitan 112,807 25,402 23 (6,773) (288)
San Diego, City of Hodges 30,633 12,276 40 597 772
San Diego, City of Lower Otay 49,849 36,340 73 (675) 179
San Diego, City of Miramar 6,682 5,452 82 0 27
San Diego, City of Morena 50,694 1,413 3 (211) 10
San Diego, City of Murray 4,684 4,010 86 17 (50)
San Diego, City of San Vicente 249,358 170,914 69 87,195 4,003
San Diego, City of Sutherland 29,508 2,512 9 33 33
San Dieguito W.D. San Dieguito 883 393 45 30 13
Sweetwater Authority Loveland 25,400 7,579 30 (77) 23
Sweetwater Authority Sweetwater 28,079 3,416 12 (170) (3)
Valley Center M.W.D. Turner 1,612 1,200 74 75 0
Vista I.D. Henshaw 51,774 5,675 11 493 121
Totals   746,385 319,790 43 80,460 4,638

Date generated: 04/19/2016

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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