Indus Water Treaty: Obstruction, exploitation and the long-overdue reckoning

India placed the Indus Waters Treaty (IWT) in abeyance following the April 2025 Pahalgam terror attack, citing Pakistan's continued support for cross-border ...

What Happened

India placed the Indus Waters Treaty (IWT) in abeyance following the April 2025 Pahalgam terror attack, citing Pakistan's continued support for cross-border terrorism as incompatible with the treaty's normal functioning.
As of May 2026, India has reiterated that the treaty will remain suspended until Pakistan takes credible and irreversible steps to end support for terrorism.
India leveraged operational control over the Baglihar and Kishanganga dams to periodically modulate water flows on the Chenab, causing flows at downstream Pakistani gauging stations to fall by approximately 90% during flushing operations in May 2025.
Pakistan has approached the UN Security Council, urging action on India's suspension, and warned of serious peace, security, and humanitarian consequences.
The Permanent Court of Arbitration (PCA) issued a Supplemental Award in June 2025 stating that India cannot unilaterally place the treaty in abeyance.
A draft law in Pakistan's Parliament seeks to formalise legal challenges, while India argues that treaty obligations cannot be separated from Pakistan's obligations under international law to prevent state-sponsored terrorism.

Static Topic Bridges

The Indus Waters Treaty, 1960 — Framework and River Allocation

The Indus Waters Treaty was signed on 19 September 1960 in Karachi by Indian Prime Minister Jawaharlal Nehru and Pakistani President Ayub Khan, with the World Bank acting as mediator. It remains one of the world's longest-functioning water-sharing agreements and survived two full-scale wars between India and Pakistan.

Three eastern rivers — Ravi, Beas, Sutlej — allocated to India (unrestricted use)
Three western rivers — Indus, Jhelum, Chenab — allocated to Pakistan; India permitted only limited non-consumptive uses (run-of-river hydropower, navigation, limited irrigation with strict design constraints)
India receives ~20% and Pakistan ~80% of the total Indus system flows
World Bank serves as guarantor but has no enforcement authority; treaty contains its own three-tier dispute resolution mechanism
Established the Permanent Indus Commission (PIC), with one commissioner from each country; mandated annual meetings
Signed under the Indus Basin Development Fund Agreement, which provided Pakistan compensation for the loss of eastern river flows

Connection to this news: India's suspension of the treaty targets Pakistan's dependence on the western rivers — which feed 80% of Pakistan's irrigated agriculture. India's engineering control over upstream infrastructure gives it leverage that is now being deployed as an instrument of strategic coercion.

Three-Tier Dispute Resolution Mechanism

The IWT provides a structured three-tier escalation framework for resolving disputes, designed to keep disagreements out of general international arbitration forums.

Tier 1 — Permanent Indus Commission (PIC): bilateral technical body; first point of contact for all differences and disputes; mandated to meet at least once a year
Tier 2 — Neutral Expert (NE): appointed by the World Bank for technical differences specified in the treaty; NE decision is binding on specified categories of disputes (e.g., hydropower project design)
Tier 3 — Court of Arbitration (Permanent Court of Arbitration, The Hague): for legal disputes; proceedings are adversarial
India has challenged Pakistan's referral of Kishanganga and Ratle hydropower disputes to the PCA, arguing these are Neutral Expert matters; the NE's award is expected by end-2026
June 2025: PCA issued a Supplemental Award asserting jurisdiction and ruling that India cannot unilaterally place the treaty in abeyance

Connection to this news: The invocation of the PCA by Pakistan — and its ruling that India's suspension is legally impermissible — creates a direct tension between India's strategic posture and its international legal obligations, which is now being debated as a long-overdue "reckoning" with treaty obligations accumulated over decades.

Water as a Geopolitical Instrument — Transboundary River Law

International law on transboundary rivers is governed primarily by the 1997 UN Watercourses Convention (not ratified by India or Pakistan) and customary international law principles of equitable and reasonable utilisation, no significant harm, and prior notification of planned measures.

India has not ratified the 1997 UN Watercourses Convention
Pakistan's agriculture irrigates ~22 million hectares; headwaters of 80% of this irrigated area originate in Indian-administered territory
India's dam-building capacity on western rivers (for run-of-river hydro) gives it significant modulation power even within treaty limits
The IWT is considered a precedent in international water law for its basin-wide approach and longevity despite political hostility

Connection to this news: India's actions — modulating flows through Baglihar and Kishanganga — while technically within treaty operational parameters (dam maintenance/flushing), have downstream effects that Pakistan characterises as treaty exploitation; this line between lawful operation and weaponisation of water is at the core of the current diplomatic dispute.

Key Facts & Data

Treaty signed: 19 September 1960, Karachi
Mediator: World Bank (International Bank for Reconstruction and Development)
Eastern rivers (India): Ravi, Beas, Sutlej
Western rivers (Pakistan): Indus, Jhelum, Chenab
Pakistan's irrigated agriculture: ~22 million hectares; 80% of headwaters under Indian control
Flow reduction at Pakistani gauging stations during Baglihar/Kishanganga flushing (May 2025): ~90%
PCA Supplemental Award ruling India's suspension unlawful: June 2025
Pakistan's appeal to UNSC: April 2026
Neutral Expert (NE) award expected: end-2026
India's position: treaty in abeyance until Pakistan ends support for terrorism (stated March 2026)