A Treaty on the Brink

The Indus Waters Agreement in Peril

It has been over a year since India placed the Indus Waters Treaty (IWT) in abeyance, a decision that has fundamentally shaken one of the most resilient pillars of Pakistan-India relations. The treaty brokered by the World Bank in 1960, was the only agreement between the two nuclear-armed rivals that had survived three full-scale wars. Its primary achievement was a division of the Indus river system. 

The treaty allocated the waters of the three eastern rivers, the Ravi, Beas, and Sutlej to India, while granting Pakistan exclusive rights to the three western rivers, the Indus, Jhelum, and Chenab. This framework was designed to be a permanent, technical solution to a potentially catastrophic water dispute. Crucially, the treaty strictly prohibits India from building any storage or diversion projects on the western rivers.

The origins of this water-sharing framework lie in the turbulent years following the 1947 partition. After years of failed bilateral talks and a major standoff, the World Bank stepped in as a mediator in 1952. The resulting treaty, signed by Prime Minister Jawaharlal Nehru and President Ayub Khan, was a masterclass in international diplomacy. It not only allocated the rivers but also provided for a massive infrastructure project. The World Bank funded Pakistan to build a replacement canal system to compensate for the water it lost from the eastern rivers.

India is violating core principles of international water law. While Pakistan's response has been diplomatic and legal, the actions taken by India threaten to unravel the only successful water-sharing agreement between the two nations, with devastating consequences for the people of Pakistan and the stability of the entire region

For six decades, the IWT was hailed as a beacon of cooperation. It is a rare example of two adversaries successfully managing a critical shared resource. It proved that even in the face of profound distrust, water could be a bridge for cooperation, with the Permanent Indus Commission ensuring data exchange and a mechanism for resolving disputes.

This history of resilience makes India's decision to place the treaty in abeyance in April 2025 so diffibult to understand. The announcement, which followed the Pahalgam terror attack that India blamed on Pakistan. It marked the first time the treaty had been directly and unilaterally challenged in its history. 

Pakistan has rejected the move, maintaining that the IWT is a binding international instrument that has no provision for unilateral suspension.  Deputy Prime Minister Ishaq Dar strongly condemned this move and stated India's suspension are not just bilateral disputes but are deliberate acts of "hydro-hegemony". It was designed to weaponize water and exert strategic pressure on Pakistan.

The most significant and alarming challenge from India is its plan to build the Chenab-Beas Link Tunnel project. This inter-basin project is designed to divert approximately 1.9 million acre-feet of water annually from the Chenab River into the Beas River system. Chenab River, a western river, was allocated to Pakistan in IWT.

Pakistan has denounced the project as a "grave violation" of the IWT and international law, including the Vienna Convention on the Law of Treaties. This is not an isolated incident; India is also actively fast-tracking several large hydropower projects on the Chenab. It includes, such as the 260 MW Dulhasti Stage-II, the 1,856 MW Sawalkote project, and the contentious 850 MW Ratle project. Pakistan views this coordinated effort as a clear demonstration of India's intent to systematically dismantle the treaty's core allocation.

Faced with these existential threats, Pakistan has escalated the issue to the highest international forum. In June 2026, Deputy Prime Minister Ishaq Dar wrote to the President of the UN Security Council, urging the 15-member body to intervene. The letter specifically highlighted the Chenab-Beas Link Tunnel and other infrastructure projects as attempts to illegally alter treaty-governed flows on the western rivers. 

Pakistan’s UN ambassador delivered the letter, warning that India's actions have "dangerous implications for Pakistan’s water, food, and economic security as well as regional stability and international peace and security".

This diplomatic offensive follows a similar letter sent in April 2026, and Pakistan has also pointed to rulings by the Permanent Court of Arbitration (PCA). The PCA has issued awards stating that India cannot unilaterally hold the treaty in abeyance. India, however, has rejected the PCA's jurisdiction, calling it illegal. It continues to assert its position that the treaty is in abeyance due to Pakistan's alleged support for terrorism. This has created a parallel legal and political conflict, where Pakistan seeks international accountability while India stands firm on its unilateral action.

Conclusively, India's decision to place the Indus Waters Treaty in abeyance. And its subsequent actions to build projects on the Chenab River is a multifaceted violation of international law. The IWT is a binding treaty, and its unilateral suspension has no basis in its text or in international treaty law.

 The planned inter-basin diversion of the Chenab's waters is a direct violation of the treaty's foundational principle of allocating the western rivers to Pakistan. Furthermore, by attempting to alter the flow of trans boundary waters without the consent of the lower riparian state.

India is violating core principles of international water law. While Pakistan's response has been diplomatic and legal, the actions taken by India threaten to unravel the only successful water-sharing agreement between the two nations, with devastating consequences for the people of Pakistan and the stability of the entire region.