A water treaty that survived wars, terror attacks and decades of hostility between India and Pakistan has entered unfamiliar territory.

On August 31, 2026, the Court of Arbitration in The Hague ruled that the Indus Waters Treaty remains in force and that India must continue observing its obligations under the 1960 agreement. It also imposed interim restrictions on certain construction activities at the Ratle Hydroelectric Project in Jammu and Kashmir.

India, however, has rejected the ruling outright.

The Ministry of External Affairs has called the tribunal “illegally constituted” and said it has no jurisdiction over India's sovereign decisions. New Delhi has also reiterated that its decision to keep the treaty in abeyance remains in force.

That creates an unusual situation: the Hague says the treaty is binding, while India says the tribunal has no authority to make that call.

So, what happens now?

What Did The Hague Rule On The Indus Waters Treaty?

The latest decision concerns India's April 2025 decision to put the agreement in “abeyance”. The tribunal concluded that this was not permissible and held that the treaty continues to remain in force.

It also said India must continue following provisions governing the design and operation of its projects on the Western Rivers — the Indus, Jhelum and Chenab.

The tribunal separately issued interim measures concerning the Ratle Hydroelectric Project. Certain portions of the dam wall and power intake structure cannot be built above specified levels until 90 days after the Neutral Expert delivers a decision on the technical dispute.

This is important, but it does not mean the entire Ratle project has been cancelled.

Why Is India Rejecting the Ruling?

India's objection is not simply about the outcome. It challenges the tribunal's jurisdiction and constitution.

The dispute over Ratle and Kishenganga began years ago. Pakistan sought arbitration over technical features of the projects, while India sought the appointment of a Neutral Expert. The World Bank eventually proceeded with both processes after efforts to find a mutually acceptable solution failed.

India has argued that allowing parallel mechanisms to deal with overlapping questions goes against the treaty's dispute-resolution structure. It also refused to appoint its arbitrators to the tribunal.

The Ministry of External Affairs therefore maintains that the so-called tribunal has no legal standing over India's decisions. In its view, a ruling from a body whose jurisdiction India does not recognise cannot determine what India can or cannot do.

This distinction is crucial. India is not merely saying, “We disagree with the judgment.” It is saying, “This body had no authority to decide the matter in the first place.”

Why Does the Water Treaty Matter So Much?

The roots of the dispute go back to Partition.

The indus river system crosses national boundaries, while canals, headworks and irrigation infrastructure were divided between the newly created countries. A serious water dispute emerged soon after Partition, highlighting the need for a permanent arrangement.

After years of negotiations, India and Pakistan signed the agreement in Karachi on September 19, 1960, with the World Bank playing a key mediating and procedural role.

The arrangement divided the six major rivers into two groups.

• Eastern Rivers: Ravi, Beas and Sutlej - allocated for India's unrestricted use under the treaty.
• Western Rivers: Indus, Jhelum and Chenab - allocated primarily to Pakistan, while India retained specified rights, including certain uses for irrigation and power generation subject to treaty conditions.

The agreement also established the Permanent Indus Commission to facilitate communication, information exchange and cooperation.

That is why the current crisis matters beyond one dam or one ruling. The treaty was designed to keep water cooperation functioning even when broader India Pakistan relations were under severe strain.

How Did the Current Crisis Begin?

The latest chapter began after the Pahalgam terror attack in April 2025, which killed 26 people.

India linked the attack to Pakistan-based or Pakistan-linked elements and subsequently announced a series of measures against Pakistan. One of them was placing the water-sharing arrangement in abeyance. Pakistan denied involvement in the attack and opposed India's decision.

For decades, water cooperation had remained relatively insulated from political and military tensions. The 2025 decision changed that equation.

It effectively connected the future of the water arrangement with the broader security relationship between the two neighbours.

What Does Ratle Have to Do With It?

The Ratle project sits on the Chenab River, one of the Western Rivers.

This is where the legal and engineering sides of the dispute meet.

India is allowed to develop certain hydroelectric projects on the Western Rivers, but the treaty places conditions on their design and operation. Pakistan has challenged aspects of the Ratle and Kishenganga projects, arguing that some design features could affect downstream flows and Pakistan's rights. India maintains that its projects are permitted within the treaty framework.

The latest Hague order therefore has practical consequences for Ratle while the technical questions continue through the Neutral Expert process.

The PCA's case record shows that the arbitration has dealt with several stages of the dispute, including questions of competence, treaty interpretation, maximum pondage and, most recently, treaty status and interim measures.

Can the Hague Force India to Comply?

This is perhaps the biggest question after the ruling.

The tribunal considers its decisions binding within the arbitration framework. India, however, rejects its jurisdiction.

That creates a gap between the legal position and the practical position.

On paper, the tribunal has ruled that the treaty remains in force. On the ground, India has made clear that it does not accept the ruling as having an effect on its sovereign actions.

For Pakistan, the ruling still carries diplomatic weight. Islamabad can point to it when arguing that India remains bound by the treaty.

For India, the ruling does not change its stated policy.

This means the dispute is unlikely to disappear simply because the tribunal has issued its decision.

Will Pakistan's Water Supply Stop?

No.

Putting the treaty in abeyance does not mean India can simply turn off the rivers.

The indus river system is a vast natural network, and India's ability to regulate water through existing and planned infrastructure is different from physically stopping the flow of the rivers altogether.

The more important issue is how much water India can store, regulate and utilise within the rights it claims, particularly through new infrastructure.

That is why the development of hydroelectric projects in Jammu and Kashmir is likely to remain an important part of the dispute.

What Could Happen Next?

Three broad possibilities stand out.

First, a prolonged standoff. India may continue rejecting the tribunal's authority while Pakistan uses the ruling to build diplomatic pressure.

Second, greater infrastructure development. India is likely to focus on making fuller use of its rights on the Western Rivers and expanding its water and power infrastructure.

Third, eventual bilateral negotiations. India has favoured revisiting the arrangement through direct talks rather than third-party mechanisms. But given the current state of India Pakistan relations, reaching such an understanding will not be easy.

The Neutral Expert process will also remain important. Its eventual decision on the technical issues surrounding the disputed projects could add another layer to the already complicated dispute.

The Bigger Question for India and Pakistan

The significance of this dispute goes well beyond Ratle.

The water-sharing agreement was created because geography made cooperation unavoidable. Rivers do not recognise political borders, even when relations between the countries on their banks deteriorate.

Today, the Hague has taken one position. India has taken another. Pakistan has gained a fresh legal and diplomatic argument, while New Delhi remains focused on sovereignty, security and greater utilisation of its water resources.

For now, the most likely outcome is not an immediate resolution, but a prolonged contest involving law, diplomacy, infrastructure and water security.

The real test will be whether India and Pakistan can eventually find a workable framework for managing shared rivers when political trust between them remains deeply strained.