Why this chapter matters for UPSC: Water is one of the most heavily tested GS3 topics — India's water crisis (groundwater depletion, uneven distribution), Jal Jeevan Mission, rainwater harvesting, inter-state water disputes, and water security are all direct exam topics.

PART 1 — Quick Reference Tables

India's Water Statistics

Indicator Value Source/Year
Annual precipitation ~4,000 billion cubic metres (BCM) CWC
Utilisable water resources ~1,123 BCM (surface + ground) CWC
Per capita water availability ~1,486 cubic metres/year (2021) CWC/NITI Aayog
Water stress threshold <1,700 cubic metres/capita/year UN
Groundwater overexploited blocks ~1,461 blocks (out of ~6,965 assessed) CGWB 2022
States with worst groundwater depletion Punjab, Haryana, Rajasthan, Delhi CGWB
Jal Jeevan Mission tap connections ~15.34 crore connections (March 2025, ~78% coverage) Jal Shakti Ministry

Water Conservation Methods

Method Description Best For
Rooftop rainwater harvesting Collect rain from rooftop → store in tank or recharge groundwater Urban + rural; reduce dependence on municipality/borewell
Check dams Small dams in streams/ravines → slow runoff → recharge groundwater Watershed management; rural
Johad Traditional village pond for water conservation; Rajasthan Semi-arid areas
Kund/Tanka Underground cylindrical cistern for collecting rainwater Rajasthan, Gujarat
Bawdi (stepwell) Traditional deep stepwells; some are ancient engineering marvels Rajasthan, Gujarat
Drip irrigation Water delivered directly to root zone; 30–50% water saving Agriculture (horticulture, orchards)
Sprinkler irrigation Simulates rain; efficient for field crops Wheat, vegetables, groundnut

PART 2 — Detailed Notes

India's Water Crisis

UPSC Connect

UPSC GS3 — India's water challenges:

The numbers:

  • India has ~4% of world's freshwater but ~18% of global population
  • Per capita availability fell from 5,177 cubic metres (1951) to ~1,486 (2021) — severe decline due to population growth
  • India is classified as water-stressed (below 1,700 m³/capita)
  • Several states (Delhi, Punjab, Haryana, Rajasthan) are approaching water-scarce status (below 1,000 m³/capita)

Groundwater crisis:

  • India is the world's largest extractor of groundwater (~250 billion cubic metres/year)
  • Punjab and Haryana: Green Revolution's legacy — paddy cultivation in naturally water-scarce areas; 80% of ground water used for agriculture; water table falling 1 metre/year in some areas
  • Delhi: Over-extraction for urban supply; groundwater depth increasing
  • CGWB (Central Ground Water Board): Regulates groundwater; classifies blocks as Safe/Semi-critical/Critical/Over-exploited
  • ~1,461 blocks are "over-exploited" (extraction > replenishment)

Climate change and water:

  • IPCC: South Asia faces increased drought and flood frequency under climate change
  • Himalayan glacier retreat → rivers (Indus, Ganga, Brahmaputra) will peak flow then decline (more flooding now, possible shortage later)
  • Rainfall variability increasing → harder to predict monsoon; flood and drought in same year

Jal Jeevan Mission

UPSC Connect

UPSC GS2/GS3 — Jal Jeevan Mission:

Jal Jeevan Mission (JJM) — 2019:

  • Goal: Provide tap water connection (Har Ghar Jal) to every rural household by 2024 (extended to 2026 for remaining)
  • Target: 19.35 crore rural households
  • Status (March 2025): ~15.34 crore connections (~78% coverage); was 3.23 crore (16.7%) at launch in August 2019
  • Budget: ₹3.6 lakh crore (largest ever water infrastructure programme)
  • Ministry: Jal Shakti

What it provides:

  • Functional Household Tap Connection (FHTC)
  • 55 litres per capita per day of potable water
  • Focus on quality: arsenic, fluoride-affected areas prioritised

JJM achievements and challenges:

  • Water testing: Every village trained to test water quality (women SHG members as "jal dootas")
  • Challenges: Ghost connections (pipe exists but no water); source sustainability; O&M after completion; 24×7 water supply not yet universal
  • Convergence with AMRUT 2.0 (urban water supply)

Related programmes:

  • National Water Mission (NWM): One of 8 missions under NAPCC (National Action Plan on Climate Change); 20% improvement in water use efficiency target
  • Atal Bhujal Yojana (ABY): Groundwater management in 7 priority states (Rajasthan, Gujarat, MP, Maharashtra, UP, Haryana, Karnataka); community-based

Rainwater Harvesting

Explainer

Why rainwater harvesting matters:

India receives ~4,000 BCM of precipitation annually but utilises only ~1,123 BCM — the rest runs off to sea or evaporates. Rainwater harvesting captures this wasted resource.

Methods:

Rooftop harvesting (urban):

  • Roof → pipe → filter → storage tank OR recharge pit (to replenish groundwater)
  • Chennai: Pioneered mandatory rooftop RWH in India (Tamil Nadu Building Rules 2003; later many other states followed)
  • Delhi: Mandatory for buildings above certain size
  • Can recharge urban aquifers → reduces floods and groundwater depletion simultaneously

Village ponds and johads (rural):

  • Johad: Traditional earthen check dam creating a pond; Rajasthan; revived by Rajendra Singh (Tarun Bharat Sangh) — "Waterman of India"; won Ramon Magsaysay Award
  • Community-built; revives groundwater; rivers started flowing again in drought-prone areas

Ancient stepwells:

  • Rani ki Vav (Gujarat): UNESCO WHS; 11th-century stepwell in Patan; multi-storey, beautifully carved; designed for water storage + community use
  • Chand Baori (Rajasthan, Abhaneri): Among world's deepest stepwells; 3,500 steps; 13 stories deep
  • Being restored for water conservation + tourism

Traditional water systems (indigenous knowledge):

  • Kund/Tanka (Rajasthan): Circular underground cisterns; plastered with lime; collect rainwater from catchment area
  • Zabo (Nagaland): Forest-field-pond system; recharge through terraced field system
  • Surangam (Kerala/Karnataka): Horizontal borehole into hillside; taps percolated water without pumping
  • Phad (Maharashtra): Community irrigation system on Tapi and Panjhra rivers; managed by farmers

Exam Strategy

Prelims traps:

  • India per capita water = ~1,486 m³/year (2021) — below 1,700 threshold (water stressed); NOT water scarce nationally but regionally scarce
  • Jal Jeevan Mission = 2019 (August 15, 2019 launch); target ALL rural households
  • India = world's largest groundwater extractor (~250 BCM/year; more than USA + China combined)
  • Johad = Rajasthan (NOT a stepwell; it's an earthen pond/check dam); Bawdi/Baoli = stepwell
  • Rani ki Vav = Gujarat (Patan) = UNESCO WHS (stepwell; on ₹100 note); NOT Rajasthan
  • Tarun Bharat Sangh/Rajendra Singh = Rajasthan water conservation (johad revival)
  • Atal Bhujal Yojana = 7 states for groundwater management

Previous Year Questions

Prelims:

  1. "Rani ki Vav," a UNESCO World Heritage stepwell, is located in which state?
    (a) Rajasthan
    (b) Gujarat
    (c) Madhya Pradesh
    (d) Maharashtra

  2. India is classified as a "water-stressed" country because its per capita water availability is below:
    (a) 500 cubic metres per year
    (b) 1,000 cubic metres per year
    (c) 1,700 cubic metres per year
    (d) 3,000 cubic metres per year

  3. The "Jal Jeevan Mission," which aims to provide tap water connections to every rural household, was launched in:
    (a) 2016
    (b) 2017
    (c) 2019
    (d) 2021