The Aquifer Is the Real Budget Constraint

Pritiraj BrahmaFounding Partner, Pritiraj & Partners · 26 March 2026

India extracts 247.22 BCM of groundwater a year — a quarter of the world's total. 730 assessment units are over-exploited. The binding constraint on Indian agriculture is not credit or price.

India subsidises the electricity that pumps the water that is running out, then subsidises the crops that require the water. Every part of that chain is separately defensible and jointly ruinous.

The National Compilation of Dynamic Ground Water Resources of India, 2025, assesses total annual groundwater recharge at 448.52 billion cubic metres, annual extractable resource at 407.75 BCM, and total annual extraction at 247.22 BCM — a Stage of Extraction of 60.63 per cent for the country as a whole. India is the world's largest consumer of groundwater, accounting for roughly a quarter of global extraction. Groundwater sustains about 64 per cent of irrigation, 85 per cent of rural drinking water and about half of urban water needs; some 87 per cent of what is extracted goes to agriculture.

The national average conceals the problem entirely, which is the first thing to say about it.

Four findings anchor this analysis:

1. Depletion is intense, local, and concentrated where it does most damage. Of 6,762 assessment units, 730 — 10.80 per cent — are categorised as over-exploited, meaning extraction exceeds annual replenishment. A further 2.97 per cent are critical and 11.21 per cent semi-critical. Punjab alone has 111 of its 153 blocks over-exploited, the second-highest in the country after Rajasthan.
2. The national trend is genuinely improving, and that improvement is real. Recharge has risen from 432 BCM in 2017 to 448.52 BCM in 2025. The share of safe assessment units has risen from 62.6 to 73.14 per cent, and over-exploited units have fallen from 17.2 to 10.8 per cent over the same period. This is one of the few environmental indicators in India moving decisively in the right direction.
3. Improvement at the aggregate does not help a block already past 100 per cent. A unit extracting more than it recharges is drawing down stock, not flow. Once the water table falls below the reach of shallow wells, the cost of extraction rises for everyone and falls hardest on the smallest farmers, who cannot afford to deepen a borewell.
4. The instruments now being used are the right ones. Jal Sanchay Jan Bhagidari targets one crore artificial recharge and storage structures; 65 per cent of MGNREGA funds in over-exploited and critical blocks have been earmarked for water-related works, and fifteen additional recharge activities — recharge shafts, injection wells, filtration ponds, artificial wetlands, spring collection chambers — have been permitted under MGNREGA for stressed districts. Converging an employment guarantee with an aquifer problem is intelligent policy design.

Why the incentive runs the wrong way

Recharge structures address supply. The harder half is demand, and demand is shaped by three policies that no state finds easy to touch.

Free or flat-rate agricultural power. When the marginal cost of pumping is zero, the rational farmer pumps until the crop is saturated. This is not misbehaviour; it is the response any economic actor would have. Metering agricultural power is the single most effective demand-side intervention available, and it is close to politically untouchable in most states.

Assured procurement of water-intensive crops. Where paddy and wheat have reliable procurement at a support price and pulses, millets and oilseeds do not, cropping choice follows procurement rather than hydrology. Punjab's block data is the arithmetic result of that policy in a state whose agro-climate never suited paddy.

Groundwater is a common pool with private extraction rights. Indian law ties groundwater to land ownership: the owner of the surface may extract beneath it. There is no effective mechanism by which one farmer's over-extraction constrains another's, which is the textbook condition for depletion of a shared resource.

The honest counter-case

A fair objection: groundwater is what made the Green Revolution work and what has kept Indian food security intact through drought years. It is farmer-controlled, requires no state irrigation bureaucracy, and delivers water on demand — advantages no canal system has matched. Restricting it without providing an alternative is a policy that reduces both output and rural incomes.

That is right, and it defines the shape of a workable answer: substitution rather than restriction. The states that have made progress did not ban extraction; they changed what was worth extracting for.

What we would do

1. Separate the feeder, then price the power. Separating agricultural feeders allows supply to be scheduled and metered without touching domestic supply. Metering need not mean charging immediately — measurement first, pricing later, with the subsidy paid as direct benefit transfer rather than as free power. A farmer who receives the subsidy in cash and pays for what is pumped has an incentive to pump less and keep the difference.
2. Shift procurement, not exhortation. Crop diversification campaigns fail against assured procurement. Procurement of pulses, millets and oilseeds at scale in over-exploited blocks would move cropping patterns in one season, because it changes the arithmetic rather than appealing to it.
3. Manage at the aquifer, not the district. Aquifers do not follow administrative boundaries. NAQUIM has mapped the entire mappable area of the country, roughly 25 lakh square kilometres. That mapping should be the unit of management, with participatory water budgeting at village level against a published aquifer balance.
4. Publish the block-level balance annually, in plain terms. Every panchayat in an over-exploited block should receive one page each year: this is what recharged, this is what was pumped, this is the difference. Community management works where the community can see the number.
5. Put water in the industrial siting decision. Data centres, thermal plants and water-intensive manufacturing are being sited without a binding water test. In a stressed block, that decision commits a resource the block does not have.

India's fiscal deficit is debated every February. Its hydrological deficit — extraction beyond replenishment across 730 blocks — is not debated at all, and it is the constraint that will bind first for tens of millions of farming households. The recharge numbers show India can move this. What remains is the half of the problem that involves telling people what to pump and what to grow.