Indus Waters Treaty

What it is

The Indus Waters Treaty, signed 19 September 1960 in Karachi, divides the six rivers of the Indus basin between India and Pakistan. The World Bank brokered nine years of negotiations and is itself a signatory. The treaty assigns the three eastern rivers (Ravi, Beas, Sutlej, roughly 33 million acre-feet per year) exclusively to India. The three western rivers (Indus main stem, Jhelum, Chenab, roughly 135 million acre-feet per year, about 80% of total basin flow) go to Pakistan, while permitting India limited run-of-river hydropower and some domestic use on those rivers. India may store no more than 3.6 million acre-feet on the western tributaries and may build only run-of-river hydropower plants there, not large storage dams. A Permanent Indus Commission, with one commissioner per country, meets annually to exchange hydrological data and resolve routine questions; unresolved differences go to a Neutral Expert, and full disputes go to an ad hoc Court of Arbitration.

History

Pakistani negotiators accepted the less-favorable eastern-river allocation partly because India had already diverted those rivers under a 1948 standstill agreement. The treaty survived the India-Pakistan wars of 1965, 1971, and 1999, making it one of the most resilient water-sharing arrangements in diplomatic history.

Disputes over Indian hydropower construction surfaced in the 2000s. Pakistan challenged India's Baglihar Dam on the Chenab; a Neutral Expert ruled in 2007 that Baglihar's design was permissible with minor modifications. Pakistan then challenged India's Kishenganga project on a Jhelum tributary; the Permanent Court of Arbitration (PCA) ruled in 2013 that India could divert limited flows but must maintain a minimum discharge. In 2016, Pakistan simultaneously activated a Neutral Expert and a Court of Arbitration over the Kishenganga and Ratle dams, causing the World Bank to pause both tracks. In October 2022 the World Bank appointed separate panels for both proceedings, effectively running them in parallel.

Current state

On 23 April 2025, one day after the Pahalgam attack in Indian-administered Kashmir that killed at least 26 people, India placed the treaty "in abeyance." India's Foreign Secretary tied restoration to Pakistan ending "cross-border terrorism," a condition Islamabad rejected as outside the treaty's text. India suspended data-sharing and the Permanent Indus Commission's meeting calendar; the Baglihar Dam on the Chenab was briefly operated to alter downstream flows as a short-term punitive measure.

A PCA award issued 15 May 2026 backed Pakistan's position on pondage limits for India's run-of-river projects. India rejected the ruling as coming from a panel with no valid jurisdiction. Pakistan convened an international conference in Islamabad on 30 June and 1 July 2026 to rally diplomatic support; no government issued a formal statement endorsing Pakistan's position. As of early July 2026, India's Water Minister CR Patil confirmed the treaty remains in abeyance. The インドによる停止が3か月目に入るなか、パキスタンがインダス水条約の国際会議を開催 node covers the conference in full.

Relationships

India cannot immediately halt western-river flows. Its existing run-of-river infrastructure stores far less water than Pakistan needs seasonally, and any new storage dam on the western rivers would take until at least 2032 to complete. Roughly 90% of Pakistan's population lives within the Indus basin, the country draws 94% of its freshwater withdrawals for agriculture, which accounts for about 22.9% of Pakistan's GDP, and all 21 major Pakistani hydroelectric plants depend on the six treaty rivers. The suspension also deepens internal Pakistani tensions: インダス条約の停止がパクスタン国内の水をめぐる争いに衝突 documents how reduced inflows sharpen the Punjab-Sindh allocation dispute, with Sindh's barrages receiving as little as 60% of their quota during the 2026 kharif planting window.

What to watch

• Whether India announces new dam or storage projects on the western rivers, which would signal a shift from diplomatic leverage to a longer-term capacity-building strategy.
• Pakistan's decision on an ICJ referral, which would need UN Security Council backing given India's non-acceptance of compulsory ICJ jurisdiction.
• Monsoon season reservoir levels in Pakistan, which as of July 2026 face a critical filling period without the treaty's required data-sharing.
• Whether any G7 or Security Council government formally endorses the PCA's May 2026 award, and how India responds to such a statement.
• Whether India's willingness to hold the treaty in abeyance prompts Bangladesh or Nepal to reassess their own water-sharing agreements with New Delhi.