Southwestern United States is in the midst of a megadrought, which is causing crucial water resources to deplete. Shasta Lake, the largest reservoir in California, was at ** percent of its gross capacity on December 1, 2022, at *** million acre feet (AF). This was roughly ** percent of the historical average for this date. Meanwhile, Lake Oroville, the states second-largest reservoir, was at ** percent of its average capacity. Lake Oroville provides water to almost ** million Californians.
California is not the only U.S. state where water resources have dropped to critically low levels due to severe droughts. In Nevada, water levels in Lake Mead have been dropping to historic lows in recent years, and in July 2022 were at the lowest monthly levels recorded since the .
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California Department of Water Resources. (December 2, 2022). Water levels of the largest reservoirs in California, United States as of December 2022 (in 1,000 acre feet) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 06, 2026, from /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/
California Department of Water Resources. "Water levels of the largest reservoirs in California, United States as of December 2022 (in 1,000 acre feet)." Chart. December 2, 2022. ÌÇÐÄÆƽâ°æ. Accessed August 06, 2026. /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/
California Department of Water Resources. (2022). Water levels of the largest reservoirs in California, United States as of December 2022 (in 1,000 acre feet). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 06, 2026. /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/
California Department of Water Resources. "Water Levels of The Largest Reservoirs in California, United States as of December 2022 (in 1,000 Acre Feet)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 2 Dec 2022, /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/
California Department of Water Resources, Water levels of the largest reservoirs in California, United States as of December 2022 (in 1,000 acre feet) ÌÇÐÄÆƽâ°æ, /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/ (last visited August 06, 2026)
Water levels of the largest reservoirs in California, United States as of December 2022 (in 1,000 acre feet) [Graph], California Department of Water Resources, December 2, 2022. [Online]. Available: /statistics/1318978/levels-of-water-supply-reservoirs-in-california-united-states/
