Indus Waters Treaty

What is the Indus Waters Treaty?

The Indus Waters Treaty (IWT) is a water-sharing agreement signed on September 19, 1960 in Karachi between Indian Prime Minister Jawaharlal Nehru and Pakistani President Ayub Khan, brokered by the World Bank. It governs the distribution of the waters of the Indus River system -- six rivers that flow through India and Pakistan. The treaty is considered one of the most durable water-sharing agreements in the world, having survived multiple wars and diplomatic crises for over six decades.

The treaty divides the six rivers into two groups: (1) Eastern Rivers -- the Beas, Ravi, and Sutlej -- allocated to India, with a combined mean annual flow of 33 million acre-feet (41 billion cubic metres); and (2) Western Rivers -- the Indus, Jhelum, and Chenab -- allocated to Pakistan, with a combined mean annual flow of 135 million acre-feet (167 billion cubic metres). India thus controls roughly 20% of the total water, while Pakistan receives 80%. India retains limited rights to use western river waters for non-consumptive purposes such as navigation, hydroelectric power generation (run-of-river projects), and limited agricultural use.

The treaty establishes a Permanent Indus Commission with commissioners from both countries who meet regularly to resolve issues. Disputes can be escalated through a three-tier mechanism: bilateral negotiations, Neutral Expert, or Court of Arbitration. As of March 2026, India has placed the treaty in abeyance following the April 2025 Pahalgam terrorist attack, making the treaty's future uncertain.

Key Features

Current Status / Latest Data

• On April 23, 2025, following the Pahalgam terrorist attack in Kashmir, India suspended the treaty, linking resumption to Pakistan ending support for terrorism.
• India stopped water flow on the Chenab River from Baglihar Dam and conducted reservoir flushing at the Salal and Baglihar projects.
• In January 2025, a Neutral Expert delivered an initial verdict affirming competence to adjudicate differences raised by India regarding the Kishanganga and Ratle projects. A final award is expected by end of 2026.
• As of March 2026, India has reiterated at the UN that the IWT will remain in abeyance until Pakistan credibly ends terrorism support, and has called for revisiting the treaty framework citing climate change, clean energy needs, and demographic pressures.
• The treaty's future remains a major diplomatic and geopolitical issue.

UPSC Exam Corner

Prelims: Key Facts

• IWT signed in 1960; brokered by the World Bank
• Eastern Rivers (India): Beas, Ravi, Sutlej
• Western Rivers (Pakistan): Indus, Jhelum, Chenab
• India gets ~20% of total Indus system water
• Permanent Indus Commission oversees implementation
• India suspended the treaty in April 2025 after the Pahalgam attack

Mains: Probable Themes

1. Geopolitics of water sharing -- IWT as a model for transboundary water cooperation and its current crisis
2. India's case for revisiting the IWT -- climate change, hydropower potential, and evolving demographic needs
3. Legal implications of treaty suspension under international law and the Vienna Convention on the Law of Treaties
4. Hydropower development on western rivers -- Kishanganga, Ratle, Baglihar and associated disputes
5. Water as a strategic tool -- the debate between cooperative diplomacy and coercive hydro-diplomacy

Sources: Wikipedia - Indus Waters Treaty, MEA India - Bilateral Documents, Organiser - India's UN Stance (March 2026)