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 600 428 71 428 402
Escondido, City of Dixon 2,606 2,386 92 (47) (151)
Escondido, City of Wohlford 2,783 2,054 74 (364) (308)
Fallbrook P.U.D. Red Mountain 1,335 486 36 152 7
Helix W.D. Cuyamaca 8,195 1,042 13 (2,046) 146
Helix W.D. Jennings 9,790 8,327 85 (652) (566)
Poway, City of Poway 3,432 2,986 87 (292) (164)
Rainbow M.W.D. Morro Hill 465 180 39 (9) (90)
Ramona M.W.D. Ramona 12,000 2,087 17 (807) (6)
San Diego County Water Authority Olivenhain 24,774 19,831 80 (1,533) 684
San Diego, City of Barrett 34,806 17,522 50 2,602 148
San Diego, City of El Capitan 112,807 43,215 38 5,081 (996)
San Diego, City of Hodges 13,401 12,095 90 (8,760) (580)
San Diego, City of Lower Otay 47,067 40,520 86 1,492 (612)
San Diego, City of Miramar 6,682 5,535 83 42 (246)
San Diego, City of Morena 50,694 5,104 10 625 (44)
San Diego, City of Murray 4,684 4,060 87 (61) (15)
San Diego, City of San Vicente 249,358 202,286 81 20,252 1,054
San Diego, City of Sutherland 29,508 6,960 24 (4,672) 167
San Dieguito W.D. San Dieguito 883 368 42 (39) 55
Sweetwater Authority Loveland 25,400 13,773 54 1,262 317
Sweetwater Authority Sweetwater 28,079 7,841 28 (2,017) (479)
Valley Center M.W.D. Turner 1,612 1,612 100 0 0
Vista I.D. Henshaw 51,774 5,083 10 (9,868) 0
Totals   722,735 405,780 56 767 (1,277)

Date generated: 3/13/2020

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.