The following table summarizes the status of Arizona’s key surface water supplies for the month of May.
| 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|
| COLORADO RIVER SYSTEM | |||||
| Lake Powell (% full) | 35 | 49 | 40 | 52 | 51 |
| Lake Mead (% full) | 38 | 43 | 41 | 39 | 40 |
| Total Colorado System (% full) | 43 | 52 | 47 | 51 | 51 |
| Elevation (Lake Mead; ft msl) | 1,077 | 1,095 | 1,088 | 1,083 | 1,084 |
| 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) | 3,561 | 3,601 | 3,577 | 3,609 | 3,605 |
| Upper Basin Water Year Precipitation to Date (% of average) | 73 | 84 | 119 | 73 | 117 |
| Upper Basin Current Snowpack (% of average) | 53 | 68 | 160 | 47 | 110 |
| SALT / VERDE RIVER SYSTEM | |||||
| Salt River Reservoirs (% full) | 79 | 98 | 81 | 61 | 75 |
| Verde River Reservoirs (% full) | 32 | 98 | 81 | 31 | 76 |
| Total Salt / Verde System (% full) | 73 | 98 | 81 | 57 | 75 |
| Salt/Verde Water Year Precipitation to Date (% of average) | 51 | 104 | 126 | 33 | 116 |
| Salt/Verde Current Snowpack Level (% of average) | N/A | N/A | N/A | N/A | N/A |
| CAP STORAGE | |||||
| Lake Pleasant (% full) | 93 | 95 | 91 | 87* | 85 |
*May 2018 Lake Pleasant storage estimated based on lake elevation of 1,691 ft msl
Data compiled from Central Arizona Water Conservation District, U.S. Bureau of Reclamation, and Salt River Project