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 (40) 0
Escondido, City of Dixon 2,606 2,447 94 (27) 7
Escondido, City of Wohlford 2,783 2,432 87 366 196
Fallbrook P.U.D. Red Mountain 1,335 399 30 113 (193)
Helix W.D. Cuyamaca 8,195 1,061 13 425 (579)
Helix W.D. Jennings 9,790 8,853 90 (83) 38
Poway, City of Poway 3,432 2,803 82 (29) (131)
Rainbow M.W.D. Morro Hill 465 344 74 188 196
Ramona M.W.D. Ramona 12,000 2,824 24 526 (28)
San Diego County Water Authority Olivenhain 24,774 21,935 89 1,453 626
San Diego, City of Barrett 34,806 17,547 50 5,416 320
San Diego, City of El Capitan 112,807 46,061 41 18,772 1,633
San Diego, City of Hodges 30,633 15,145 113 1,808 (1,431)
San Diego, City of Lower Otay 47,067 38,752 82 5,604 (416)
San Diego, City of Miramar 6,682 5,606 84 43 113
San Diego, City of Morena 50,694 5,296 10 1,525 59
San Diego, City of Murray 4,684 4,067 87 66 (23)
San Diego, City of San Vicente 249,358 202,963 81 16,492 4,214
San Diego, City of Sutherland 29,508 5,998 20 (7,335) (1,538)
San Dieguito W.D. San Dieguito 883 712 81 0 241
Sweetwater Authority Loveland 25,400 11,640 46 (2,456) 733
Sweetwater Authority Sweetwater 28,079 14,270 51 8,105 (839)
Valley Center M.W.D. Turner 1,612 1,612 100 412 0
Vista I.D. Henshaw 51,774 16,113 31 11,860 (1,005)
Totals   739,967 428,880 58 63,202 2,195

Date generated: 6/17/2019

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.