State of Tamil Nadu v. State of Karnataka
Background
This is an interim order, not a final judgment. In its suit against Karnataka, Tamil Nadu applied for directions against Karnataka's water diversion works on the Pennaiyar river until a Water Disputes Tribunal is set up.
Decision Breakdown
This is an interim order, not a final judgment. The Court dismissed the application but allowed Tamil Nadu to apply to the Central Government for a Tribunal. The suit was listed for further directions on 10.01.2020.
Lesson Learnt
There is no final ruling yet on the river water dispute between the two States.