PUERTO-RICO RESERVOIR REPORT

Last Updated: December 29, 2025

As of the latest observations, the national status of dams and reservoirs reflects a varied landscape of water storage levels across the country. Some regions are experiencing abundant water reserves, while others face significant deficits, often correlating with prevailing weather patterns, snowpack conditions, and usage demands. Notably, major water bodies such as Lake Mead in Nevada and Lake Powell in Arizona have reported storage levels far below their historical averages, indicative of the prolonged drought affecting the Southwest. Conversely, northern states such as Montana's Flathead Lake at Polson exhibit storage levels exceeding average figures, possibly benefiting from recent precipitation and runoff influx.

In contrasting examples, California's Lake San Antonio has shown a remarkable increase in storage, surpassing historical averages, while Florida's Ward Lake near Bradenton is at a lower than typical gage height. These snapshots underscore the complexity of water management challenges, as hydrologists and researchers grapple with a dynamic interplay of natural forces and human influence. The data suggests a pressing need for adaptive measures in water resource planning and underscores the importance of ongoing monitoring to inform sustainable management practices. Overall, the current state of the nation's dams and reservoirs serves as a reminder of the importance of vigilant and proactive water stewardship in an era of climate variability.

Puerto Rico has several major reservoirs and dams that serve as critical sources of water for the island's population and agriculture. The largest reservoir is the Carraízo Lake, which is fed by the Rio Grande de Loíza and other smaller streams. Other major reservoirs include the Dos Bocas and Caonillas Reservoirs. The hydrology of the area is influenced by the central mountain range, which receives the majority of the precipitation and snowpack during the winter months. Drought conditions are common in Puerto Rico, and water conservation measures are often necessary to maintain adequate water supply. In recent years, the island has experienced record drought conditions, with some reservoirs dropping to historic lows. Seasonal trends show that the island's wet season is from May to November, while the dry season runs from December to April. Overall, the management and maintenance of Puerto Rico's reservoirs and dams remain critical to ensuring a reliable water supply for the island's population and agriculture.

Puerto Rico has several major reservoirs and dams that serve as critical sources of water for the island's population and agriculture. The largest reservoir is the Carraízo Lake, which is fed by the Rio Grande de Loíza and other smaller streams. Other major reservoirs include the Dos Bocas and Caonillas Reservoirs. The hydrology of the area is influenced by the central mountain range, which receives the majority of the precipitation and snowpack during the winter months. Drought conditions are common in Puerto Rico, and water conservation measures are often necessary to maintain adequate water supply. In recent years, the island has experienced record drought conditions, with some reservoirs dropping to historic lows. Seasonal trends show that the island's wet season is from May to November, while the dry season runs from December to April. Overall, the management and maintenance of Puerto Rico's reservoirs and dams remain critical to ensuring a reliable water supply for the island's population and agriculture.