Status of Arizona surface water supplies: August 2021

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The following table summarizes the status of Arizona’s key surface water supplies for the month of August.

2021 2020 2019 2018 2017
COLORADO RIVER SYSTEM
Lake Powell (% full) 32 50 55 49 63
Lake Mead (% full) 35 40 38 38 38
Total Colorado System (% full) 40 51 55 49 57
Elevation (Lake Mead; ft msl) 1,068 1,084 1,083 1,078 1,080
DCP “Tier Zero” Declaration Elevation (ft msl) 1,090 1,090 NA NA NA
Tier 1 Shortage Declaration Elevation (ft msl) 1,075 1,075 1,075 1,075 1,075
Elevation (Lake Powell; ft msl) 3,553 3,605 3,621 3,601 3,633
Upper Basin Water Year Precipitation to Date (% of average) 80 81 120 68 114
Upper Basin Current Snowpack (% of average) NA NA NA NA NA
SALT / VERDE RIVER SYSTEM
Salt River Reservoirs (% full) 71 91 75 52 70
Verde River Reservoirs (% full) 41 60 56 28 61
Total Salt / Verde System (% full) 67 88 73 49 69
Salt/Verde Water Year Precipitation to Date (% of average) 71 93 112 50 117
Salt/Verde Current Snowpack Level (% of average) NA NA NA NA NA
CAP STORAGE
Lake Pleasant (% full) 64 62 65 47* 63*

*August 2017-2018 Lake Pleasant storage estimated based on lake level

Data compiled from Central Arizona Water Conservation District, U.S. Bureau of Reclamation, and Salt River Project