KEY WORDS: WATER USAGE IN URBAN ENVIRONMENTS • IRRIGATION WITH IMPORTED AND RECLAIMED WATER • TECHNOLOGY EVALUATIONS FOR WATER-EFFICIENT PROCESSES • NON-TRADITIONAL WATER SOURCES: RECLAMATION, DIRECT AND INDIRECT POTABLE REUSE, DESALINATION  • ENERGY EFFICIENCY OF THE WATER SECTOR • ENERGY INTENSITY OF WATER PROCESSING • WATER-ENERGY EFFICIENCY • WASTE-TO-ENERGY • TECHNOLOGY EVALUATIONS FOR ENERGY-EFFICIENT WATER PROCESSES