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 600 277 46 277 61
Escondido, City of Dixon 2,606 2,474 95 (35) (21)
Escondido, City of Wohlford 2,783 2,030 73 (276) (60)
Fallbrook P.U.D. Red Mountain 1,335 357 27 67 (159)
Helix W.D. Cuyamaca 8,195 551 7 (37) (47)
Helix W.D. Jennings 9,790 7,390 75 (836) (434)
Poway, City of Poway 3,432 3,186 93 18 321
Rainbow M.W.D. Morro Hill 465 124 27 (146) (274)
Ramona M.W.D. Ramona 12,000 1,573 13 (584) (121)
San Diego County Water Authority Olivenhain 24,774 17,601 71 (2,248) 64
San Diego, City of Barrett 34,806 20,500 59 4,068 (139)
San Diego, City of El Capitan 112,807 41,934 37 (1,066) (3,065)
San Diego, City of Hodges 13,401 12,095 90 (212) (550)
San Diego, City of Lower Otay 47,067 40,333 86 2,636 (141)
San Diego, City of Miramar 6,682 5,678 85 308 157
San Diego, City of Morena 50,694 5,207 10 740 (15)
San Diego, City of Murray 4,684 4,044 86 (69) 0
San Diego, City of San Vicente 249,358 165,936 67 (26,571) (7,516)
San Diego, City of Sutherland 29,508 10,626 36 4,606 (125)
Santa Fe Irrigation District San Dieguito 883 360 41 (34) 61
Sweetwater Authority Loveland 25,400 18,175 72 6,656 (81)
Sweetwater Authority Sweetwater 28,079 6,225 22 (2,673) (285)
Valley Center M.W.D. Turner 1,612 1,475 92 88 0
Vista I.D. Henshaw 51,774 5,620 11 1,256 (179)
Totals   722,735 373,769 52 (14,067) (12,547)

Date generated: 10/29/2020

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.