BharatNotes 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 (2024–2026)
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 use of Cauvery water, directing parties to file documents within six weeks. The case tests whether the IRWD Act bars Karnataka's Original Suit and whether the SC's 2018 modified award is the final word on allocation
- Karnataka sought to bifurcate "Karnataka Cauvery Water" from the allocated share to claim additional usage rights — an argument that, if accepted, would effectively reopen the 2018 award
- The Cauvery basin is also closely linked to groundwater rights — an issue not directly covered by the Tribunal award
UPSC angle: Prelims — CWMA constituted 1 June 2018; Supreme Court framed 8 issues in March 2024 in Karnataka's suit. Mains — analyse why the Cauvery dispute continues despite a final SC-modified award; what institutional mechanisms are needed for durable implementation of inter-state water sharing?
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
Recent Developments (2024–2026)
Cauvery — SC Framed 8 Issues in Karnataka's Suit (March 2024)
In March 2024, the Supreme Court framed 8 issues in Karnataka's original suit against Tamil Nadu, Kerala, and Puducherry on Cauvery water use, directing parties to file documents within six weeks. The suit tests whether Karnataka can separately claim "Karnataka Cauvery Water" beyond the SC's 2018 modified award (which allocated 404.25 TMC to Tamil Nadu and 284.75 TMC to Karnataka, with Kerala and Puducherry receiving smaller allocations). Karnataka seeks to challenge the framework by arguing that the allocation should be reformulated based on updated hydrological data and post-2018 developments.
UPSC angle: Prelims — 8 issues framed March 2024; CWMA constituted 1 June 2018; SC's 2018 award. Mains — why does the Cauvery dispute persist despite a final award? Evaluate the limitations of the tribunal system and the CWMA in ensuring compliance.
Mahadayi Dispute — Karnataka's Diversion Plans Continue (2024)
The 2018 Mahadayi Tribunal award permitted Karnataka to divert 13.42 TMC of water from the Mahadayi (Mandovi) basin for drinking water in Hubli-Dharwad and northern Karnataka. Goa challenged the award before the Supreme Court. In 2024, Karnataka continued the Kalasa-Banduri diversion project (for drinking water supply to Hubli-Dharwad-Gadag-Belagavi), which remains pending challenge before the Supreme Court. Goa argues any diversion violates the Western Ghats' ecological sensitivity.
UPSC angle: Prelims — Mahadayi Tribunal Award (August 2018); Karnataka diversion 13.42 TMC; Kalasa-Banduri project. Mains — analyse the tension between development rights of an upper-riparian state and ecological protections downstream; how should tribunal awards handle climate-sensitive river basins?
Mahanadi Dispute — Tribunal Proceedings Continue (2024)
The Mahanadi Water Disputes Tribunal (constituted 2018) continued proceedings in 2024 on the dispute between Odisha and Chhattisgarh. Odisha alleges that Chhattisgarh's construction of storage structures in upper Mahanadi is reducing downstream flows critical for irrigation and the Hirakud reservoir. The tribunal has been collecting hydrological data and examining state submissions.
UPSC angle: Prelims — Mahanadi Tribunal (2018); Odisha v. Chhattisgarh; storage structures reducing flows. Mains — compare the Mahanadi dispute with Cauvery in terms of legal framework, nature of the dispute (new infrastructure vs historic allocation), and remedy options.
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
