Overview

Water is a State subject (Entry 17, State List) but rivers flowing through multiple states create disputes that require a national adjudication framework. Article 262 of the Constitution confers this power on Parliament, and Parliament enacted the Inter-State River Water Disputes Act, 1956 to operationalise it.

Constitutional Framework — Article 262

Clause Provision
Article 262(1) Parliament may by law provide for the adjudication of any dispute or complaint with respect to the use, distribution, or control of the waters of, or in, any inter-State river or river valley
Article 262(2) Parliament may by law provide that neither the Supreme Court nor any other court shall exercise jurisdiction in respect of any such dispute

Article 262 is a federal conflict resolution mechanism and is an exception to the Supreme Court's general original jurisdiction under Article 131. Under the Inter-State River Water Disputes Act, 1956, the jurisdiction of courts (including the Supreme Court) is barred in respect of matters referred to a Tribunal — making Tribunal awards the final word on allocation.

Supporting Legislation

Law Key Provisions
Inter-State River Water Disputes Act, 1956 (IRWD Act) Central Government to set up a Tribunal if it cannot resolve a dispute within 1 year of a State's request; Tribunal award is final and binding; Section 6 — Central Government to publish award in Gazette, whereupon it has force of law
River Boards Act, 1956 Provides for establishment of River Boards for integrated development of inter-state rivers — has never been used in practice; Section 8 of IRWD Act bars reference to Tribunal for matters referable to River Boards
River Data Dissemination Act, 2022 Mandates regular dissemination of hydrological data (flows, storage levels) — intended to reduce information asymmetry that fuels disputes

Major Inter-State Water Dispute Tribunals

Tribunal River States Involved Year Set Up Award / Status
Krishna Water Disputes Tribunal-I (KWDT-I) Krishna Maharashtra, Karnataka, Andhra Pradesh 1969 Award 1973; water allocated: AP 800 TMC, Karnataka 700 TMC, Maharashtra 585 TMC
Godavari Water Disputes Tribunal Godavari Maharashtra, AP, Karnataka, MP, Odisha 1969 Award 1979; published in Gazette; effective
Narmada Water Disputes Tribunal (NWDT) Narmada MP, Gujarat, Maharashtra, Rajasthan 1969 Award 7 December 1979; published 12 December 1979; binding; review clause after 45 years
Ravi & Beas Waters Tribunal Ravi, Beas Punjab, Haryana, Rajasthan 1986 Award not yet notified; Punjab Termination of Agreements Act 2004 (struck down SC 2016) further complicated matters
Cauvery Water Disputes Tribunal (CWDT) Cauvery Tamil Nadu, Karnataka, Kerala, Puducherry 1990 Final Award February 2007; gazetted February 2013; Supreme Court modification February 2018 — TN: 404.25 TMC; Karnataka: 284.75 TMC; Kerala: 30 TMC; Puducherry: 7 TMC
Krishna Water Disputes Tribunal-II (KWDT-II) Krishna AP, Karnataka, Telangana, Maharashtra 2004 Report submitted; not yet notified
Vansadhara Water Disputes Tribunal Vansadhara Odisha, Andhra Pradesh 2010 Award submitted; not yet notified
Mahadayi Water Disputes Tribunal Mahadayi / Mandovi Goa, Karnataka, Maharashtra 2010 Final award August 2018; gazetted 2018; Karnataka permitted to divert water outside basin for drinking use
Mahanadi Water Disputes Tribunal Mahanadi Odisha, Chhattisgarh 2018 Proceedings ongoing

Key status distinction: Awards of Krishna-I, Godavari, Narmada, Cauvery, and Mahadayi Tribunals are gazetted and effective. Awards of Ravi-Beas, KWDT-II, and Vansadhara are not yet notified and therefore not operative.

Cauvery Dispute — Recent Developments

The Cauvery dispute is the most politically charged inter-state water dispute in India:

  • The Cauvery Water Management Authority (CWMA) was constituted on 1 June 2018 to implement the Supreme Court's modified award
  • In August 2023, Tamil Nadu requested Karnataka to release 24,000 cusecs per day; Karnataka refused citing water shortage — the matter went back to the CWMA and eventually the Supreme Court
  • In March 2024, the Supreme Court framed 8 issues in Karnataka's original suit against Tamil Nadu, Kerala, and Puducherry over water use, directing parties to file documents within six weeks
  • The Cauvery basin is also closely linked to groundwater rights — an issue not directly covered by the Tribunal award

Mahadayi Dispute

The Mahadayi (or Mandovi) river originates in Karnataka and flows through Goa to the Arabian Sea:

  • Karnataka sought diversion of water to drought-prone Hubli-Dharwad districts for drinking water
  • Goa opposed any diversion, citing ecological sensitivity of the Western Ghats
  • The 2018 Tribunal award permitted Karnataka a limited diversion (13.42 TMC out of 13.42 TMC claimed for drinking water use)
  • The award was contested in the Supreme Court; proceedings continued in 2024

Challenges and Reform Proposals

Challenge Detail
Delay in Gazetting awards Awards of KWDT-II and Vansadhara remain unnotified years after submission — states lobby the Union Government
River Boards Act never used The 1956 Act intended integrated basin management; no River Board has ever been constituted
Changing hydrology Climate change alters river flows; original allocations based on historical flow data are contested
Groundwater not covered IRWD Act covers surface waters only; groundwater exploitation by upstream states affects downstream flows
Inter-state pollutants Water quality disputes not within the ambit of Article 262 / IRWD Act

Key Points for UPSC

  • Article 262 explicitly bars Supreme Court / High Court jurisdiction over inter-state water disputes — an exception to Article 131 and Article 32
  • Water is a State subject (List II, Entry 17) but Parliament regulates inter-state rivers (Entry 56, Union List — for regulation in public interest)
  • The River Boards Act, 1956 has never been operationalised — a key governance gap
  • Awards of 5 tribunals (Krishna-I, Godavari, Narmada, Cauvery, Mahadayi) are gazetted and binding; awards of 3 tribunals remain unnotified
  • Cauvery Water Management Authority (CWMA) and Cauvery Water Regulation Committee (CWRC) were created in 2018 to oversee implementation of the Supreme Court's award
  • The River Data Dissemination Act, 2022 is a recent addition to the legal framework — aimed at improving data transparency in river basins