<h1>Safe drinking water provision in schools via RO treatment and coolers ensures potable supply despite contaminated groundwater.</h1> Project SAJAL provides potable water in 20 government schools in districts affected by industrial groundwater contamination by installing Reverse Osmosis units to reduce dissolved solids and other contaminants and water coolers to maintain acceptable serving temperatures, with site selection justified by Central Ground Water Board findings that chemical parameters and salinity exceed BIS 10500 potable limits.