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Delhi’s groundwater, a lifeline for nearly 20% of the city’s population that still depends on borewells and tubewells, is now facing a worsening salinity crisis. The recently released Annual Ground Water Quality Report 2025 by the Central Ground Water Board (CGWB) places the national capital among the poorest-performing regions in India when measured by Electrical Conductivity (EC), which indicates the level of salinity and dissolved solids present in water.

The findings are serious. Nearly 33.33% of groundwater samples collected from Delhi recorded EC levels above 3000 µS/cm. This is the maximum permissible limit set by the Bureau of Indian Standards. Water that crosses this threshold is considered unfit for drinking and harmful for long-term agricultural use,

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