Parched again: On Bengaluru’s drinking water woes

While Karnataka arsenic a full is improving its h2o security, Bengaluru is dealing with utmost groundwater withdrawal. The State drew 66% of the groundwater that it could sustainably extract successful 2025, but Bengaluru East Taluka drew 378%. The sustainably extractable measurement of groundwater is based connected however overmuch withdrawal volition deplete the aquifer, truthful portion 378% does not mean Bengaluru East has depleted its groundwater, it is reminiscent of an ongoing situation that has, erstwhile again, turned acute. The Bengaluru portion lies connected crystalline stone that already stores small h2o and recharges slowly. The metropolis further concentrates request successful areas with higher colonisation density and per-capita consumption, including ‘tech parks’ and flat complexes. The built-up country of specified municipality infrastructure besides suppresses recharge by percolating rainwater. A increasing fraction of the colonisation depends connected h2o from the Cauvery, which comes with a precocious enlargement cost. Thus, the occupation has a earthy ground but has been compounded implicit the years by inconsiderate urbanisation, wherever the costs — monetary and, increasingly, existential — are being passed connected to the populace.

In 2024, a anemic monsoon near astir fractional of Bengaluru’s 14,000 borewells dry. The authorities launched a task to proviso 775 cardinal litres per time to 110 villages and little groundwater stress. But to date, the task has achieved lone midway coverage, leaving galore residents inactive banking connected tankers. A 2026 survey recovered that the situation has since moved to Koramangala and Hebbal. The Bangalore Water Supply and Sewerage Board has besides been utilizing treated sewage h2o to recharge lakes. It seems Bengaluru is treating proviso arsenic infinitely expandable erstwhile it is not. Its penchant for grey implicit greenish infrastructure has sealed the crushed against replenishment portion the expanding request liquidates ecological capital. The metropolis does not negociate its pipeline supply, groundwater, and wastewater together, allowing consumers to default to the astir convenient solution: tankers. Authorities request to minimise organisation losses and penalise overextraction and mandate 100% decentralised wastewater recycling for each non-potable uses. The perfect semipermanent solution remains unchanged: Bengaluru needs to go a ‘sponge city’. This includes restoring the connections betwixt lakes and wells to seizure monsoon runoff, frankincense aligning land-use readying with the recharge capableness of each taluka, and wide sealing the crushed little and expanding absorption connected the surface.