Bengaluru’s Groundwater Crisis Deepens: 378% Extraction in East Taluka & Push for Sponge‑City Measures

Overview While Karnataka is improving overall water security, its capital Bengaluru faces an acute groundwater crisis. In 2025 the state extracted 66 % of the sustainably withdrawable groundwater , but the East Taluka of Bengaluru drew a staggering 378 % of its sustainable quota. Key Developments (2024‑2026) 2024 weak monsoon left nearly 50 % of Bengaluru’s 14,000 borewells dry . State launched a scheme to supply 775 million litres per day to 110 villages, but only half the target has been met. 2026 study shows the crisis shifting to Koramangala and Hebbal areas. The BWSSB began using treated sewage for lake recharge, yet reliance on water tankers persists. Policy focus remains on expanding supply (grey infrastructure) rather than enhancing natural recharge (green infrastructure). Important Facts The city sits on crystalline rock , limiting natural storage. Rapid urbanisation—tech parks, high‑rise apartments—concentrates demand and seals the ground, curbing percolation. A growing share of the population now depends on water from the Cauvery , which entails high expansion costs. The current approach treats water supply as infinitely expandable, ignoring the finite nature of aquifers. UPSC Relevance Understanding Bengaluru’s crisis touches upon several GS papers: GS3 (Environment & Ecology) – groundwater depletion, aquifer recharge, and sustainable water management; GS2 (Polity & Governance) – role of state agencies like BWSSB, policy implementation, and regulatory penalties; GS3 (Economy) – cost implications of sourcing water from distant rivers and the economic burden of tanker‑based supply; and GS4 (Ethics) – equity concerns as water scarcity disproportionately affects low‑income groups. Way Forward Integrate pipeline supply, groundwater, and wastewater management to prevent default to tankers. Impose strict penalties for over‑extraction and reduce distribution losses. Mandate 100 % decentralised wastewater recycling for non‑potable uses. Adopt the sponge‑city model: reconnect lakes to wells, protect recharge zones, and limit ground sealing. Align land‑use planning with the recharge capacity of each taluka, ensuring new developments do not exceed sustainable extraction limits. Only a coordinated, green‑infrastructure‑first strategy can restore Bengaluru’s groundwater balance and safeguard its future growth.