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Priority stretches’ by CPCB
February 10 , 2025
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- Rivers in Chennai and Salem have been identified as “priority stretches” by the Central Pollution Control Board (CPCB) based on water quality data.
- According to CPCB, Tamil Nadu has 10 severely polluted river stretches and have been categorised under Priority I to V.
- Of these, the Adyar and Cooum in Chennai, and Thirumanimuthar and Vasishta rivers near Salem are Priority I.
- The Cooum river stretch from Avadi to Sathya Nagar is the most contaminated, with a biochemical oxygen demand of 345 mg/L, far exceeding the permissible limit of 3 mg/L for bathing waters.
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