PREPA has a modern electric power system that serves the entire main island of Puerto Rico and its two adjacent islands Vieques and Culebra. The system generates, transmits and distributes electricity to 1,449,211 clients.


Electric energy is produced by five main power plants: Costa Sur, Aguirre,  San Juan, Palo Seco and Cambalache Sixty-eight percent (68%) of the total energy production is fuel oil-based; 15% natural gas (LNG); 15% coal; and approximately 2% hydro.


Transmission system is comprised of 2,416 miles of 230 kV transmission lines, 115 kV and 38 kV sub transmission lines – with 175 transmission centers. 


Distribution lines amount to approximately 28,952 aerial miles and 1,723 underground miles. The system has 334 substations and 27 technical offices.


PO Box 364267, San Juan, PR  00936-4267
(787) 521-3434 Fax: (787) 521-4120
Island (Toll Free): 1-800-981-2434 Hearing Impared: (787)521-3050

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© 2009 Autoridad de Energía Eléctrica