21 Jan 2026
Project: State of Cauvery River System
Project Hub Page | State of Cauvery River System - Karnataka This project hub will be updated as analyses are completed and new material is published. Project Purpose The project critically examines polluted river stretches in the Cauvery River Basin, state responses, judicial interventions, and governance gaps, translating these findings into…
14 Jan 2026
Explainer: What is Biological Oxygen Demand (BOD)?
Biological Oxygen Demand (BOD) is one of the most widely used indicators of water quality, measuring the level of biodegradable organic pollution in surface waters. In India, BOD has an enforceable statutory threshold of ≤ 3 mg/L, as notified under the Primary Water Quality Criteria for Bathing Waters (2000), and…
14 Jan 2026
Timeline: Polluted River Stretches of Karnataka
The Polluted River Stretches (PRS) assessment by the Central Pollution Control Board (CPCB) provides a national snapshot of river health using a statutory, Biological Oxygen Demand (BOD)-based criterion. This page traces the timeline of PRS assessments, with a particular focus on Karnataka’s rivers, including those in the Cauvery basin. 2000Statutory…
