<h2>Overview</h2> <p>While <span class="key-term" data-definition="Karnataka — a southern Indian state; its water‑security policies are examined in GS3 (Environment) and GS2 (Polity)">Karnataka</span> is improving overall water security, its capital <span class="key-term" data-definition="Bengaluru — the state capital of Karnataka, a major IT hub; its urban water challenges are relevant to GS3 (Environment) and GS2 (Polity)">Bengaluru</span> faces an acute groundwater crisis. In 2025 the state extracted <strong>66 % of the sustainably withdrawable groundwater</strong>, but the East <span class="key-term" data-definition="Taluka — an administrative sub‑district in India; relevant to GS2 (Polity)">Taluka</span> of Bengaluru drew a staggering <strong>378 %</strong> of its sustainable quota.</p> <h3>Key Developments (2024‑2026)</h3> <ul> <li>2024 weak monsoon left nearly <strong>50 % of Bengaluru’s 14,000 borewells dry</strong>.</li> <li>State launched a scheme to supply <strong>775 million litres per day</strong> to 110 villages, but only half the target has been met.</li> <li>2026 study shows the crisis shifting to <strong>Koramangala and Hebbal</strong> areas.</li> <li>The <span class="key-term" data-definition="Bangalore Water Supply and Sewerage Board (BWSSB) — the agency responsible for water supply and sewage in Bengaluru; falls under GS2 (Polity)">BWSSB</span> began using treated sewage for lake recharge, yet reliance on water tankers persists.</li> <li>Policy focus remains on expanding supply (grey infrastructure) rather than enhancing natural recharge (green infrastructure).</li> </ul> <h3>Important Facts</h3> <p>The city sits on <span class="key-term" data-definition="Crystalline rock — hard, low‑porosity rock that stores little water and recharges slowly; a key factor in groundwater scarcity (GS3: Environment)">crystalline rock</span>, 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 <span class="key-term" data-definition="Cauvery River — a major river supplying water to Karnataka and Tamil Nadu; water‑resource management is a GS3 topic)">Cauvery</span>, which entails high expansion costs. The current approach treats water supply as infinitely expandable, ignoring the finite nature of aquifers.</p> <h3>UPSC Relevance</h3> <p>Understanding Bengaluru’s crisis touches upon several GS papers: <strong>GS3 (Environment & Ecology)</strong> – groundwater depletion, aquifer recharge, and sustainable water management; <strong>GS2 (Polity & Governance)</strong> – role of state agencies like BWSSB, policy implementation, and regulatory penalties; <strong>GS3 (Economy)</strong> – cost implications of sourcing water from distant rivers and the economic burden of tanker‑based supply; and <strong>GS4 (Ethics)</strong> – equity concerns as water scarcity disproportionately affects low‑income groups.</p> <h3>Way Forward</h3> <ul> <li>Integrate pipeline supply, groundwater, and wastewater management to prevent default to tankers.</li> <li>Impose strict penalties for over‑extraction and reduce distribution losses.</li> <li>Mandate <strong>100 % decentralised wastewater recycling</strong> for non‑potable uses.</li> <li>Adopt the <span class="key-term" data-definition="Sponge city — an urban design concept that enhances natural water absorption through restored lakes, wetlands, and permeable surfaces; vital for sustainable water management (GS3: Environment)">sponge‑city</span> model: reconnect lakes to wells, protect recharge zones, and limit ground sealing.</li> <li>Align land‑use planning with the recharge capacity of each taluka, ensuring new developments do not exceed sustainable extraction limits.</li> </ul> <p>Only a coordinated, green‑infrastructure‑first strategy can restore Bengaluru’s groundwater balance and safeguard its future growth.</p>