The river under dispute involving Madhya Pradesh, Maharashtra, and Gujarat is the Narmada. The Narmada river is one of the longest rivers in India, flowing through these three states. The dispute over the river arises due to various factors such as water-sharing, irrigation, and hydroelectric projects. It is important to note that the Narmada river has been a subject of controversy and legal battles, with conflicting interests and concerns of the states involved. The dispute highlights the challenges in managing water resources and balancing the needs of different regions. It is an ongoing issue that requires careful negotiation and planning to ensure fair and sustainable use of the Narmada river`s water.