CPCB Report Shows Slight Reduction in Polluted River Stretches Across India in 2023
A report by the Central Pollution Control Board (CPCB) indicates a marginal dip in the number of polluted river locations in India, from 815 in 2022 to 807 in 2023. The agency uses Biological Oxygen Demand (BOD) as a proxy for organic pollution. Locations with BOD exceeding 3 mg/litre are considered unfit for bathing, while those exceeding 30 mg/litre are classified as 'Priority 1' (most polluted). Maharashtra has the highest number of polluted river stretches. While 'Priority 1' stretches reduced from 45 to 37, the overall pollution levels remain a significant environmental challenge.
Key Points
- Biological Oxygen Demand (BOD) is the primary parameter used to measure river health.
- BOD > 3 mg/l indicates pollution; BOD > 30 mg/l indicates critical pollution (Priority 1).
- Maharashtra, Gujarat, and Uttar Pradesh have the highest number of 'Priority 1' river stretches.
- The CPCB monitors water quality at 4,736 locations across the country.
Exam Facts
- Number of polluted locations in 2023: 807.
- Priority 1 threshold: BOD > 30 mg/litre.
- Central Pollution Control Board (CPCB).
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