Water wealth: On groundwater exploitation in Punjab
A recent assessment highlighted that groundwater extraction in Punjab has crossed unsustainable levels, driven largely by free electricity for agricultural tube wells and water-intensive paddy cultivation.
The Central Ground Water Board's (CGWB) latest Dynamic Groundwater Resource Assessment found that the overwhelming majority of Punjab's groundwater assessment blocks are now categorised "over-exploited," with annual extraction significantly exceeding annual recharge.
The commentary noted that the benefits of the free-power subsidy are skewed toward medium and large farmers, who own bigger landholdings and more tube wells, while small and marginal farmers capture a proportionately smaller share even as the state bears a large annual subsidy bill.
Existing regulatory tools, such as the Punjab Preservation of Subsoil Water Act, 2009, which mandates delayed paddy transplantation, and calls for crop diversification away from paddy were flagged as necessary correctives that have not been sufficient to reverse the depletion trend.
CGWB groundwater categorisation and the "stage of extraction" metric
The Central Ground Water Board, under the Ministry of Jal Shakti, periodically assesses groundwater "assessment units" (blocks/mandals/taluks) across India and classifies each based on its "stage of groundwater extraction," the ratio of annual groundwater extraction to net annual groundwater availability (recharge). Units are classified as Safe (extraction below 70% of recharge), Semi-Critical (70-90%), Critical (90-100%), or Over-Exploited (extraction exceeds 100% of annual recharge, i.e., more water is being pumped out than is being replenished each year).
Key Details
- The most recent CGWB Dynamic Groundwater Resource Assessment (2024 report) found only a small minority of Punjab's roughly 150 assessment blocks in the "Safe" category, with the large majority classified Over-Exploited or Critical.
- Nationally, about 11% of India's roughly 6,700 assessment units were categorised Over-Exploited in the 2024 assessment, making Punjab a significant outlier with one of the worst state-level records.
- The Indus Basin aquifer underlying Punjab is widely cited as one of the most groundwater-stressed aquifer systems in the world, given the scale and duration of over-extraction for irrigation.
The core claim that Punjab is undergoing severe groundwater exploitation is drawn directly from this CGWB classification framework, the same safe/semi-critical/critical/over-exploited scale that UPSC tests as a precise, numbers-based Environment & Ecology concept.
Agricultural power subsidy, MSP-driven paddy cultivation, and the economics of depletion
Punjab supplies free (unmetered or flat-rate) electricity to agricultural tube wells under a state subsidy scheme. Removing the marginal cost of pumping removes any price signal discouraging over-extraction, and this dovetails with the state's paddy-heavy cropping pattern, paddy is a water-intensive crop that is also procured by the government at an assured Minimum Support Price (MSP), which reduces the incentive for farmers to diversify into less water-intensive crops.
Key Details
- Studies of the subsidy's distribution have found that a disproportionate share of its benefits accrues to medium and large farmers, who own more land and more tube wells, while small and marginal farmers, who most need income support, capture a smaller share of the subsidy even though it is their water table that is also depleting.
- The free-power subsidy represents a large recurring fiscal burden on the Punjab state budget each year.
- The Punjab Preservation of Subsoil Water Act, 2009 addresses one part of the problem by legally mandating that paddy transplantation not occur before a government-notified date (aligned with monsoon onset), reducing pre-monsoon groundwater pumping for nursery and transplantation, but it does not address the underlying free-power price distortion that continues to incentivise water-intensive cultivation through the season.
The argument that groundwater exploitation disincentivises small farmers follows from this subsidy-capture asymmetry, free power and assured MSP procurement lock in paddy cultivation and depress incentives to diversify, while the fiscal and ecological costs of the resulting depletion are borne broadly, even as small farmers gain proportionately less from the subsidy that helps drive it.
- CGWB groundwater categories: Safe (extraction under 70% of annual recharge), Semi-Critical (70-90%), Critical (90-100%), Over-Exploited (over 100%).
- Punjab: only a small minority of its roughly 150 groundwater assessment blocks fall in the "Safe" category in the latest (2024) CGWB Dynamic Groundwater Resource Assessment; the large majority are Over-Exploited or Critical.
- Nationally, around 11% of India's approximately 6,700 groundwater assessment units were classified Over-Exploited in the 2024 assessment.
- The Punjab Preservation of Subsoil Water Act, 2009 mandates delayed paddy transplantation to conserve groundwater.
- Punjab's free agricultural power subsidy is a recurring, multi-thousand-crore annual fiscal commitment for the state government. [Unverified — precise current-year figure not independently confirmed]