In March 2014, the Airport Authority (AA) joined the "Let's Save 10L Water" Campaign organised by the Water Supplies Department. The campaign aims to encourage individuals and organisations to conserve water resources. AA implements a number of measures to minimise its daily water usage and adopts a "Triple Water System" to improve the efficiency of our three major water sources: freshwater, seawater and treated wastewater. Through the system, freshwater demand at HKIA is reduced by over 50% each year.