Lake Mead and Lake Powell, day by day

Source: U.S. Bureau of Reclamation, Hydrodata (Lake Mead, Lake Powell): daily pool elevation, storage and releases. U.S. federal agency data. All data considered provisional and subject to revision. Elevations are feet above sea level, not depth. Lows and highs are our calculation from these files, counted from Jan 1, 1941 for Lake Mead and Jan 1, 1980 for Lake Powell, to skip most of the filling years; both lakes were lower than these lows while they first filled. Storage is the figure Reclamation reports. Its figure for the same water level changes on Jul 1, 2022 at Lake Powell (about 0.44 million acre-feet lower) and on Jan 1, 2012 at Lake Mead (about 0.25 million acre-feet higher), so earlier and later storage is not directly comparable. Levels are not affected. Lake Powell's storage is live storage, which leaves out water below the dam's outlets. Releases are water sent through the dam; they leave out evaporation and any water taken directly from the lake. Reclamation reported record lows at both lakes in August 2026; the later dates here come from its daily data, not from a Reclamation statement.