Reservoir levels fall as Costa Mar's hydro grid faces September tightening

The Laguna Azul reservoir, which feeds nearly forty percent of Costa Mar's hydro capacity, stood at 64 percent of full storage on Friday morning, according to readings from the Federal Hydro Authority's monitoring station at the spillway. That figure marks the lowest September reading in seven years and comes as the region enters the final six weeks of its dry season, when rainfall dips below fifteen millimetres per week across the peninsula.

The strain reflects a widening gap between what Costa Mar can generate and what the federal grid demands from it. Oriente Moderno and Tierra Verde, both landlocked regions without maritime hydroelectric assets, have requested increased power exports from Costa Mar and Nord Europa to meet autumn industrial demand. The Federal Treasury's allocation formula, revised in March 2026, obligates Costa Mar to supply up to forty megawatts of surplus capacity to the inter-regional transmission network—a commitment the region can meet only if reservoir levels hold above sixty percent through October.

Federal Hydro Authority officials acknowledged the tightness in a statement issued Friday afternoon but said current models show adequate water for the remainder of the dry season. The statement did not address whether Costa Mar might need to curtail tourism-sector power allocations or request a temporary reduction in federal export obligations if the next four weeks bring below-average rainfall.