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 743,000 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 March 6, 2017

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 148 25 (24) (303)
Escondido, City of Dixon 2,606 2,474 95 116 215
Escondido, City of Wohlford 6,506 2,362 36 308 0
Fallbrook P.U.D. Red Mountain 1,335 454 34 45 25
Helix W.D. Cuyamaca 8,195 4,778 58 4,030 1,486
Helix W.D. Jennings 9,790 8,942 91 692 145
Poway, City of Poway 3,330 3,288 99 536 276
Rainbow M.W.D. Morro Hill 465 350 75 233 (10)
Ramona M.W.D. Ramona 12,000 2,922 24 320 273
San Diego County Water Authority Olivenhain 24,375 24,256 100 2,524 5,109
San Diego, City of Barrett 34,806 10,773 31 8,684 5,210
San Diego, City of El Capitan 112,807 47,863 42 17,646 14,423
San Diego, City of Hodges 30,633 24,694 81 12,297 8,663
San Diego, City of Lower Otay 47,067 47,013 100 9,907 4,454
San Diego, City of Miramar 6,682 5,663 85 1,114 226
San Diego, City of Morena 50,694 2,996 6 1,593 1,022
San Diego, City of Murray 4,684 4,060 87 365 (61)
San Diego, City of San Vicente 249,358 189,816 76 27,540 4,801
San Diego, City of Sutherland 29,508 11,115 38 8,676 5,807
San Dieguito W.D. San Dieguito 883 406 46 55 (23)
Sweetwater Authority Loveland 25,400 16,600 65 9,046 3,985
Sweetwater Authority Sweetwater 28,079 10,595 38 7,149 5,120
Valley Center M.W.D. Turner 1,612 1,612 100 587 225
Vista I.D. Henshaw 51,774 15,005 29 10,132 6,216
Totals   743,189 438,187 59 123,570 67,284

Date generated: 03/06/2017

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.