Status of Arizona surface water supplies: December 2021

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

2021 2020 2019 2018 2017
COLORADO RIVER SYSTEM
Lake Powell (% full) 28 43 53 43 59
Lake Mead (% full) 34 39 40 38 39
Total Colorado System (% full) 37 47 46 46 54
Elevation (Lake Mead; ft msl) 1,065 1,082 1,085 1,079 1,081
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) 3,540 3,587 3,611 3,585 3,625
Upper Basin Water Year Precipitation to Date (% of average) 95 57 86 110 57
Upper Basin Current Snowpack (% of average) 73 69 128 104 58
SALT / VERDE RIVER SYSTEM
Salt River Reservoirs (% full) 72 83 73 49 64
Verde River Reservoirs (% full) 34 36 49 31 40
Total Salt / Verde System (% full) 67 77 70 47 61
Salt/Verde Water Year Precipitation to Date (% of average) 68 32 149 109 2
Salt/Verde Current Snowpack Level (% of average) 62 13 251 84 6
CAP STORAGE
Lake Pleasant (% full) 71 70 83 64 73

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