Chennai’s political waters stirred Thursday as PMK leader Anbumani Ramadoss sounded an alarm over Karnataka’s accelerating efforts to build the contentious Mekedatu dam. His call to action landed just hours after Karnataka’s irrigation minister personally appealed to Central Water Commission chairman Anupam Prasad for swift approval.

Key facts

  • Karnataka submitted revised Detailed Project Report (DPR) before August 19, 2026
  • Central Water Commission rejected initial DPR on June 29, 2026
  • Karnataka’s original DPR submission occurred in 2019

Mounting pressure from the west

Karnataka isn’t just knocking gently on Delhi’s door—it’s leaning hard. Irrigation Minister Chaluvaraya Swamy didn’t merely send a letter; he showed up in person, promising any technical details the CWC might need while pressing for an immediate site inspection. That kind of direct engagement speaks volumes about how seriously Bengaluru is taking this push.

Meanwhile, Anbumani watches from Chennai with growing concern. He sees Tamil Nadu’s government appearing “indifferent” while their neighbor races ahead. The timeline tells a worrying story: rejection in June, revised plans by August, and now high-level meetings in September. Karnataka’s momentum feels palpable.

The legal battlefield

Here’s where things get technically tense. The CWC didn’t casually dismiss Karnataka’s first proposal—it specifically cited conflicts with both the Cauvery Water Disputes Tribunal’s final award and the Supreme Court’s judgment. Those are weighty legal obstacles that Karnataka must now navigate around with its revised documentation.

Anbumani’s prescription involves multiple levels of intervention. He wants Chief Minister C. Joseph Vijay to personally meet not just the CWC chairman, but also the Union Water Resources Minister and even the Prime Minister. He’s calling for nothing less than complete rejection of the project and the withdrawal of the 2018 permission that allowed Karnataka to submit its DPR in the first place.

A familiar conflict reignites

This isn’t some new skirmish—it’s the latest chapter in a long-standing water war between the two states. The Cauvery River has been a source of tension for decades, with both agricultural communities and growing cities thirsting for reliable water access.

What makes this moment particularly delicate is the combination of Karnataka’ assertive new moves and what Anbumani characterizes as Tamil Nadu’s passive response. With the CWC now reviewing revised plans, the window for influence may be closing fast.