What is water stress ? How and why does it differ regionally in India ?
Approach · directive: “what / how and why”
What it asks · Define water stress and explain India's regional pattern of it through rainfall, geology, crops, population and water management.
It asks 3 things — answer each
- Define water stress, with the official per-capita thresholds and India's position
- Explain how water stress differs regionally in India: the north-west, the peninsular plateau, rain-rich uplands, cities and coasts
- Explain why it differs: rainfall and geology, cropping and population, irrigation source and governance
Open with · Water stress begins below 1,700 cubic metres per person a year; India averaged 1,486 in 2021, and NITI Aayog's index (2018) found nearly 600 million facing high to extreme stress.
Cover
- Meaning: demand nearing or exceeding reliable renewable supply, so quantity, quality, timing and access suffer.
- North-west plains: paddy–wheat pumping drives over-exploitation; CGWB (2024) rates 751 assessment units over-exploited.
- Peninsular plateau: hard-rock aquifers store little, rainfall is erratic, sugarcane adds demand, so drought recurs.
- Rain-rich uplands: steep slopes and fast runoff bring dry-season shortage despite high rainfall.
- Cities and coasts: rapid growth, leakage, pollution and saline ingress.
- Why: rainfall and geology, crop choice (agriculture uses 92% of groundwater), population, cheap power and weak regulation.
- Way forward: Jal Shakti Abhiyan (2019) in 256 districts, Atal Bhujal Yojana in 80 water-stressed districts, crop diversification.
Close with · India's water stress is uneven and largely man-made; aligning crops and pumping with each region's hydrology is the core of SDG 6.
Add value (verified)
- The Ministry of Jal Shakti (PIB, 5 February 2024) states the official thresholds and, citing a Central Water Commission study, puts India's average per-capita water availability at 1,486 cubic metres for 2021.Per Capita Water Availability - Ministry of Jal Shakti, Press Information Bureau (5 February 2024) ↗“Annual per-capita water availability of less than 1700 cubic meter is considered as water stressed condition whereas annual per-capita water availability below 1000 cubic meters is considered as a water scarcity condition.”
- NITI Aayog's Composite Water Management Index (June 2018): nearly 600 million people face high to extreme water stress.Composite Water Management Index — PIB, Ministry of Jal Shakti ↗“published by NITI Aayog in June 2018, mentions that India is undergoing the worst water crisis in its history and nearly 600 million people are facing high to extreme water stress”
- CGWB's Dynamic Ground Water Resource Assessment 2024: 751 assessment units (11.1%) are over-exploited.Dynamic Ground Water Resource Assessment Report 2024 — PIB, Ministry of Jal Shakti ↗“206 (3.05 %) assessment units, have been categorized as ‘Critical’ and 751 (11.1%) assessment units have been categorized as ‘Over-exploited’”
- Jal Shakti Abhiyan (2019) sent central teams to 1,592 water-stressed blocks in 256 districts.Jal Shakti Abhiyan launch — PIB, Ministry of Jal Shakti ↗“teams of officers from the central government will visit and work with district administration in 1592 water stressed blocks in 256 districts”
- Atal Bhujal Yojana: a Rs 6,000 crore scheme in 80 water-stressed districts and 8,565 gram panchayats of seven States.Atal Bhujal Yojana — PIB, Ministry of Jal Shakti ↗“Atal Jal is being implemented in 80 water stressed districts and 8,565 Gram Panchayats of seven States viz. Gujarat, Haryana, Karnataka, Madhya Pradesh, Maharashtra, Rajasthan and Uttar Pradesh”
- CGWB's 2025 assessment: 730 of 6,762 assessment units (10.80%) are over-exploited.National Compilation on Dynamic Ground Water Resources of India, 2025 — Central Ground Water Board, Ministry of Jal Shakti ↗“Out of the total 6762 assessment units (Blocks/ Mandals/ Talukas) in the country, 730 units in various States/ UTs (10.80 %) have been categorized as ‘Over-exploited’”
Question: UPSC's CS (Main) 2019, GS Paper I — paper ↗. Approach: Minimalist IAS, checked 16 Oct 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer· 318words · Minimalist IAS
Water stress sets in when annual per-capita water availability falls below 1,700 cubic metres; below 1,000 it is scarcity. India averaged only 1,486 cubic metres in 2021 (CWC), and NITI Aayog's Composite Water Management Index (2018) found nearly 600 million people facing high to extreme stress.
What water stress is
- A mismatch, not just drought: stress arises when demand from farms, homes and industry nears or exceeds reliable renewable supply, so quantity, quality, timing and access all suffer.
How it differs across India
| Region | Main driver | How stress shows |
|---|---|---|
| North-west plains | paddy–wheat pumping | falling water tables |
| Peninsular plateau | hard rock, erratic monsoon | recurrent drought |
| Himalaya, North-East | steep slopes, fast runoff | dry-season shortage |
- North-west (Punjab, Haryana, Rajasthan): canal and tube-well irrigation of rice and wheat mines aquifers; nationally, CGWB's 2025 assessment rated 730 of 6,762 units (10.8%) over-exploited.
- Peninsular and western India: crystalline rocks store little groundwater, so Marathwada, Saurashtra and interior Karnataka swing between monsoon surplus and drought, worsened by sugarcane.
- Rain-rich uplands: high rainfall runs off quickly; drying springs leave hill towns short in summer.
- Cities and coasts: growth, leaking networks and sewage pollution strain urban supply, while over-pumping draws sea water into coastal aquifers.
Why it differs
- Nature: rainfall amount and variability, rock type deciding storage and recharge, and terrain deciding runoff.
- Use: agriculture takes 92% of groundwater use (NCERT), so cropping pattern and population density decide pressure.
- Governance: free or flat-rate farm power, procurement favouring water-hungry crops and weak groundwater regulation.
Way forward
- Region-specific action: Jal Shakti Abhiyan (2019) targeted 1,592 water-stressed blocks in 256 districts; the later Atal Bhujal Yojana runs community water budgets in 80 water-stressed districts of seven States; crop diversification and micro-irrigation fit the north-west, recharge and watershed work the plateau.
Water stress in India is uneven and largely man-made; matching crops and pumping to each region's hydrology is the surest route to SDG 6, clean water and sanitation for all.
Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 16 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.
