Top 10 California Reservoirs

Folsom Lake and Lake Oroville among Hardest Hit

Folsom, CA- What a difference a year makes. A year ago on this date, California’s largest reservoirs were near or well above their average capacity for July 4th. Fast forward twelve months and signs of drought permeate The Golden State’s water supply.

With the exception of the Don Pedro and New Melones reservoirs which currently hover just under 80 percent of average capacity, California’s reservoirs are showing stark signs of drought fatigue.

Most Depleted Reservoirs

Folsom Lake, a critical water supply to the Sacramento region is among the most depleted reservoirs among California’s Top 10. Lake Oroville at nearly four times the size of Folsom Lake isn’t faring much better. Folsom Lake is currently at 29% capacity (35% of average), while Lake Oroville sits at 31% capacity (39% of average). Pine Flat Reservoir which impounds the Kings River currently sits at just 28% capacity.

Lake Oroville 2017

Did You Know?

  • Taller than the Hoover Dam, the Lake Oroville Dam at 770 feet is the tallest in the United States!
  • Lake Shasta is California’s largest reservoir with capacity of 1,907,481 acre feet. Folsom Lake has a capacity of 346,358 acre feet.
  • An acre foot is approximately 326,000 gallons. The average U.S. household is estimated to use between one half to one acre foot per year.
  • In 2017, the Lake Oroville Dam spillway at risk of failure caused a large scale evacuation

Total Outdoor use accounts for an estimated 30 percent of water use according the U.S. EPA.

Top 10 California Reservoirs – Aug 1

RESERVOIRStorage (Acre Feet)% Capacity% Average
Shasta Lake1,907,4813245
New Melones1,329,6074370
Don Pedro1,316,8165774
Lake Oroville1,291,556not reporting
Trinity Lake1,231,0524151
San Luis Res827,6172042
New Bullards Bar550,2144862
Lake McClure432,5433050
Pine Flat Res394,3372142
Folsom Lake346,3582535
data source: California Dept of Water Resources

Top 10 California Reservoirs – July 4

RESERVOIRStorage (Acre Feet)% Capacity% Average
Shasta Lake1,907,4813848
New Melones1,329,6075079
Don Pedro1,316,8166177
Lake Oroville1,291,5563139
Trinity Lake1,231,0524755
San Luis Res827,6173251
New Bullards Bar550,2145362
Lake McClure432,5433753
Pine Flat Res394,3372841
Folsom Lake346,3582935
data source: California Dept of Water Resources

Top 10 California Reservoirs – June 28

RESERVOIRStorage (Acre Feet)% Capacity% Average
Shasta Lake1,907,4813948
New Melones1,329,6075281
Don Pedro1,316,8166279
Lake Oroville1,291,5563340
Trinity Lake1,231,0524856
San Luis Res827,6173452
New Bullards Bar550,2145563
Lake McClure432,5433955
Pine Flat Res394,3373145
Folsom Lake346,3583137
data source: California Dept of Water Resources

Top 10 California Reservoirs – June 10

RESERVOIRStorage (Acre Feet)% Capacity% Average
Shasta Lake1,907,4814250
New Melones1,329,6075587
Don Pedro1,316,8166584
Lake Oroville1,291,5563744
Trinity Lake1,231,0525058
San Luis Res827,6174154
New Bullards Bar550,2145766
Lake McClure432,5434261
Pine Flat Res394,3373955
Folsom Lake346,3583542
data source: California Dept of Water Resources