Study region: The largest 23 water utilities in Chile providing water and sanitation services to 97. 9 % of total urban customers. Study focus: This study introduces an innovative methodological framework based on inverse data envelopment analysis technique to quantify the additional operational costs required for water utilities to enhance their water supply and sanitation continuity... https://www.ealisboa.com/super-save-Moondrop-Quarks-DSP-mega-find/