The following table summarizes the status of Arizona’s key surface water supplies for the month of May.
| 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|
| COLORADO RIVER SYSTEM | |||||
| Lake Powell (% full) | 24 | 35 | 49 | 40 | 52 |
| Lake Mead (% full) | 30 | 38 | 43 | 41 | 39 |
| Total Colorado System (% full) | 34 | 43 | 52 | 47 | 51 |
| Elevation (Lake Mead; ft msl) | 1,053 | 1,095 | 1,088 | 1,083 | 1,083 |
| DCP “Tier Zero” Declaration Elevation (ft msl) | 1,090 | 1,090 | N,090 | NA | NA |
| Tier 1 Shortage Declaration Elevation (ft msl) | 1,075 | 1,075 | 1,075 | 1,075 | 1,075 |
| Tier 2 Shortage Declaration Elevation (ft msl) | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 |
| Elevation (Lake Powell; ft msl) | 3,523 | 3,561 | 3,601 | 3,577 | 3,609 |
| Minimum Power Generation Elevation (ft msl) | 3,490 | 3,490 | 3,490 | 3,490 | 3,490 |
| Upper Basin Water Year Precipitation to Date (% of average) | 94 | 73 | 84 | 119 | 73 |
| Upper Basin Current Snowpack (% of average) | 68 | 53 | 68 | 160 | 47 |
| SALT / VERDE RIVER SYSTEM | |||||
| Salt River Reservoirs (% full) | 76 | 79 | 98 | 81 | 61 |
| Verde River Reservoirs (% full) | 33 | 32 | 98 | 81 | 31 |
| Total Salt / Verde System (% full) | 71 | 73 | 98 | 81 | 57 |
| Salt/Verde Water Year Precipitation to Date (% of average) | 70 | 51 | 104 | 126 | 33 |
| Salt/Verde Current Snowpack Level (% of average) | N/A | N/A | N/A | N/A | N/A |
| CAP STORAGE | |||||
| Lake Pleasant (% full) | 89 | 93 | 95 | 91 | 87* |
*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