September 2026 at California's 10 largest reservoirs

Warmer and Wetter Winter Forecast

Folsom, Calif.- Status updates for major California reservoirs. Planning is in full swing as the potential Super El-Nino is forecasted to bring much heavier rains across California this upcoming wet season.

Here's how California's 10 largest reservoirs stand as the wet season inches closer.

Fun Facts

  • Taller than the Hoover Dam, the Lake Oroville Dam at 770 feet is the tallest in the United States.
  • New Bullard's Bar Dam completed in 1969 is the 4th dam at ~this site.
  • 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.

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

California reservoir levels over time

Opened in 1969 and impounding the North Yuba River, it stands at 645 feet height high.

September 2026

RESERVOIR% Capacity% Average
FOLSOM LAKE4685
Trinity71111
Shasta5696
Don Pedropending…
Lake Oroville5492
New Bullards75113
New Melones66114
San Luis Res66168
Lake McClurepending…
Pine Flat1649

November 2025

RESERVOIR% Capacity% Average
FOLSOM LAKE43100
Trinity71122
Shasta56105
Don Pedronana
Lake Oroville54102
New Bullards63105
New Melones67126
San Luis Res52117
Lake McClure59138
Pine Flat2695
Hell Hole Reservoir
Placer County's Hell Hole Reservoir

Nov 1, 2023

RESERVOIR% Capacity% Average
Shasta Lake69129
New Melones79147
Don Pedro81123
Lake Oroville68134
Trinity Lake5086
San Luis Res65145
New Bullards Bar69115
Lake McClure65152
Pine Flat Res56202
FOLSOM LAKE57131

November 1, 2022

RESERVOIR% Capacity% Average
Shasta Lake3158
New Melones2445
Don Pedro4975
Lake Oroville3161
Trinity Lake2238
San Luis Res2555
New Bullards Bar62 103
Lake McClure1842
Pine Flat Res1656
FOLSOM LAKE3069

Top 10 California Reservoirs – July 4, 2021

RESERVOIR% Capacity% Average
Shasta Lake3848
New Melones5079
Don Pedro6177
Lake Oroville3139
Trinity Lake4755
San Luis Res3251
New Bullards Bar5362
Lake McClure3753
Pine Flat Res2841
Folsom Lake2935

data source: California Dept of Water Resources


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