DELAWARE RESERVOIR REPORT

Last Updated: February 11, 2026

Across the nation, dams and reservoirs play a crucial role in water supply, agricultural irrigation, flood control, and recreation. Currently, there is a notable variance in storage levels, reflecting diverse hydrological conditions. For instance, Lake Powell, straddling Arizona, exhibits storage levels significantly below average, with current storage at 6,058,625 acre-ft compared to the historical average of 14,671,042.6 acre-ft, indicating potential water supply stress and hydroelectric power generation challenges. In contrast, Utah Lake in Utah is experiencing a surplus, with storage levels rising to 690,563 acre-ft from the average of 629,839.45 acre-ft. These variations are indicative of broader environmental patterns, such as precipitation, snowpack conditions, and river flows that feed into these critical water bodies.

On a more granular level, California's Lake Almanor and Lake San Antonio are above their historical storage averages, possibly a result of targeted conservation measures and above-average precipitation. Conversely, Colorado's Dillon, Granby, and Green Mountain reservoirs are all reporting storage below average, which may raise concerns about water availability for the upcoming dry season. Similarly, New Mexico's Heron and El Vado reservoirs are well below their average storage levels, pointing to ongoing drought conditions that could affect local water restrictions and management decisions. As hydrologists and water management experts continue to monitor these vital resources, the data underscores the importance of adaptive water management strategies to navigate the variability and challenges posed by changing climatic conditions.

Delaware only has a few small reservoirs and dams, with the largest being the Hoopes Reservoir, which provides drinking water to the city of Wilmington. Other small reservoirs include the Killens Pond and Lums Pond. These reservoirs are fed by streams and creeks such as the Red Clay Creek and White Clay Creek. Snowpack and mountainous areas are not relevant in Delaware's hydrology, as the state is relatively flat. The region experiences a humid subtropical climate with hot summers and mild winters. There have been occasional drought conditions, such as in 2016 when Delaware experienced a moderate drought. Overall, the state's water supply is considered sufficient and reliably meets the needs of the population.

Delaware only has a few small reservoirs and dams, with the largest being the Hoopes Reservoir, which provides drinking water to the city of Wilmington. Other small reservoirs include the Killens Pond and Lums Pond. These reservoirs are fed by streams and creeks such as the Red Clay Creek and White Clay Creek. Snowpack and mountainous areas are not relevant in Delaware's hydrology, as the state is relatively flat. The region experiences a humid subtropical climate with hot summers and mild winters. There have been occasional drought conditions, such as in 2016 when Delaware experienced a moderate drought. Overall, the state's water supply is considered sufficient and reliably meets the needs of the population.