According to a new assessment by the Central Pollution Control Board (CPCB), Mumbai ’s rivers remain among the most polluted in the country. The report also shows that Maharashtra has 54 polluted rivers, which is the highest in India.

The report highlights that the Mithi River, which flows from Powai and Vihar lakes into Mahim Creek, is one of the most polluted. Despite repeated cleaning drives, the water remains unsafe and of poor quality. The Dahisar, Poisar, Oshiwara, and Ulhas rivers are also badly affected.

The CPCB defines polluted stretches as parts of rivers where biochemical oxygen demand, or BOD, is above 3 milligrams per litre. High BOD levels show more organic pollution and pose risks to aquatic life. Two or more consecutive polluted areas on the same river are treated as

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