Drought combined with water withdrawals has caused a drop in the lake’s water level. The reservoir finished filling in 1980. The highest water level recorded was in July 1983. The lowest was in October 2004. As of January 2019, the lake’s level is down over 100 feet from its high mark.
On the chart, the numbers on the left indicate feet above sea level for the lake’s water level. A water level of 3,700 feet is the reservoir at full capacity.
Lake Powell Historical Water Level Data
Source: U.S. Bureau of Reclamation.