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 740,000 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 (13) 1
Escondido, City of Dixon 2,606 2,433 93 68 (76)
Escondido, City of Wohlford 2,783 2,278 82 128 (28)
Fallbrook P.U.D. Red Mountain 1,335 604 45 338 315
Helix W.D. Cuyamaca 8,195 607 7 242 19
Helix W.D. Jennings 9,790 8,256 84 (710) 30
Poway, City of Poway 3,432 3,067 89 58 (101)
Rainbow M.W.D. Morro Hill 465 95 20 0 (175)
Ramona M.W.D. Ramona 12,000 2,076 17 (278) (81)
San Diego County Water Authority Olivenhain 24,774 18,989 77 (2,302) (860)
San Diego, City of Barrett 34,806 16,456 47 5,512 24
San Diego, City of El Capitan 112,807 42,699 38 16,364 (301)
San Diego, City of Hodges 30,633 13,146 43 1,727 840
San Diego, City of Lower Otay 47,067 37,424 80 5,619 (273)
San Diego, City of Miramar 6,682 5,563 83 14 194
San Diego, City of Morena 50,694 4,311 9 1,332 (156)
San Diego, City of Murray 4,684 4,083 87 8 (31)
San Diego, City of San Vicente 249,358 190,762 77 17,169 (1,746)
San Diego, City of Sutherland 29,508 6,053 21 (6,042) 33
San Dieguito W.D. San Dieguito 883 376 43 (48) (17)
Sweetwater Authority Loveland 25,400 11,779 46 (1,480) 260
Sweetwater Authority Sweetwater 28,079 8,266 29 4,595 (633)
Valley Center M.W.D. Turner 1,612 1,433 89 342 46
Vista I.D. Henshaw 51,774 4,454 9 2,132 90
Totals   739,967 385,210 52 44,773 (2,626)

Date generated: 12/6/2019

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.