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 (34) 0
Escondido, City of Dixon 2,606 2,386 92 (82) (61)
Escondido, City of Wohlford 2,783 2,474 89 432 42
Fallbrook P.U.D. Red Mountain 1,335 363 27 (156) (36)
Helix W.D. Cuyamaca 8,195 856 10 277 (205)
Helix W.D. Jennings 9,790 8,856 90 (65) 3
Poway, City of Poway 3,432 2,877 84 240 74
Rainbow M.W.D. Morro Hill 465 117 25 (63) (227)
Ramona M.W.D. Ramona 12,000 2,735 23 461 (89)
San Diego County Water Authority Olivenhain 24,774 21,236 86 843 (699)
San Diego, City of Barrett 34,806 17,522 50 5,633 (25)
San Diego, City of El Capitan 112,807 46,374 41 19,416 313
San Diego, City of Hodges 30,633 14,730 110 2,301 (416)
San Diego, City of Lower Otay 47,067 38,154 81 6,101 (598)
San Diego, City of Miramar 6,682 5,592 84 28 (14)
San Diego, City of Morena 50,694 5,207 10 1,562 (89)
San Diego, City of Murray 4,684 4,010 86 (135) (58)
San Diego, City of San Vicente 249,358 199,802 80 13,914 (3,161)
San Diego, City of Sutherland 29,508 6,354 22 (6,786) 355
San Dieguito W.D. San Dieguito 883 712 81 32 0
Sweetwater Authority Loveland 25,400 11,996 47 (1,968) 356
Sweetwater Authority Sweetwater 28,079 12,946 46 7,605 (1,324)
Valley Center M.W.D. Turner 1,612 1,612 100 445 0
Vista I.D. Henshaw 51,774 14,266 28 10,411 (1,847)
Totals   739,967 421,175 57 60,412 (7,705)

Date generated: 6/26/2019

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.