Why Tamil Nadu and Karnataka are sparring over Cauvery water? | Explained

The Cauvery Water Management Authority is meeting to address water allocation disputes between Karnataka and Tamil Nadu amid a poor monsoon season. The discussion centers on the 2018 Supreme Court judgment that dictates water sharing ratios for the riparian states.
The story so far: The eight-year-old Cauvery Water Management Authority (CWMA) is holding its 53rd meeting in New Delhi on Wednesday (July 22, 2026) amid an extremely poor southwest monsoon (June-September) in many parts of southern States, especially catchment of the Cauvery river. The two principal riparian States — Karnataka and Tamil Nadu — are expected to present their point forcefully at tomorrow’s meeting, as they have been reeling under the impact of an adverse monsoon.
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