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

Local reservoir storage, in acre-feet, for Water Authority member agencies - As of February 12, 2018

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 90 15 (439) (80)
Escondido, City of Dixon 2,606 2,454 94 209 55
Escondido, City of Wohlford 6,506 2,174 33 (160) (36)
Fallbrook P.U.D. Red Mountain 1,335 266 20 (170) 9
Helix W.D. Cuyamaca 8,195 588 7 (3,160) (19)
Helix W.D. Jennings 9,790 9,022 92 122 37
Poway, City of Poway 3,330 2,928 88 (102) 12
Rainbow M.W.D. Morro Hill 465 64 14 (351) (164)
Ramona M.W.D. Ramona 12,000 2,293 19 (376) (99)
San Diego County Water Authority Olivenhain 24,774 18,331 74 (530) (380)
San Diego, City of Barrett 34,806 12,187 35 6,416 0
San Diego, City of El Capitan 112,807 30,898 27 (4,424) (1,497)
San Diego, City of Hodges 30,633 15,110 49 (1,502) (140)
San Diego, City of Lower Otay 47,067 37,788 80 (5,059) (1,010)
San Diego, City of Miramar 6,682 5,493 82 69 (70)
San Diego, City of Morena 50,694 3,949 8 1,888 (122)
San Diego, City of Murray 4,684 4,129 88 23 8
San Diego, City of San Vicente 249,358 187,052 75 2,837 291
San Diego, City of Sutherland 29,508 13,333 45 7,247 (35)
San Dieguito W.D. San Dieguito 883 406 46 (85) 0
Sweetwater Authority Loveland 25,400 13,918 55 471 5
Sweetwater Authority Sweetwater 28,079 8,749 31 2,737 (570)
Valley Center M.W.D. Turner 1,612 1,200 74 (188) (38)
Vista I.D. Henshaw 51,774 3,699 7 (5,681) 100
Totals   743,588 376,121 51 (208) (3,745)

Date generated: 2/13/2018

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.