Sustainable Development Goal (SDG) Indicator 6.4.1: Change in water use efficiency over time.
Globally, Water Use efficiency (WUE) rose from 17.47 USD/m3 in 2015 to 21.50 USD/m3 in 2022, marking a 23 percent efficiency increase (Figure 15). Oceania and Europe and Northern America remained the most water efficient regions, with WUE levels of 71.71 USD/m3 and 54.64 USD/ m3 , respectively (Figure 16). However, Eastern, Central and Southern Asia recorded the highest growth in WUE between 2015 and 2022, with increases of 51.32 percent, 46.25 percent and 34.13 percent respectively. In contrast, Latin America and the Caribbean experienced a slight decline in WUE, decreasing by 0.47 percent over the same period. At the sectoral level, agriculture exhibited the lowest Water Use Efficiency (WUE) among economic sectors. In 2022, the global average WUE for agriculture was 0.69 USD/m3 , significantly lower than that of the industrial sector (38.43 USD/m3 ) and the service sector (114.45 USD/m3 ). However, agriculture recorded the largest improvement in Water Use Efficiency ove...