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Faecal coliform in Adyar river
January 9 , 2025
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- Levels of faecal coliform in the Adyar River have been found to be more than 10 times the prescribed safe limit.
- The tests showed high levels of faecal coliform - 1026 MPN/100 ml, far exceeding the permissible limit of 100 MPN/100 ml.
- MPN is Most Probable Number, an estimation used to measure microorganisms in water.
- The significant contamination is believed to be the reason behind the fish kills observed in the Adyar eco-park in June 2024.
- Further, other indicators of water quality were also alarming, with the Biological Oxygen Demand at 133 mg/l (standard: 3 mg/l), Chemical Oxygen Demand at 136 mg/l (standard: 280 mg/l), and Total Nitrogen at 57.74 mg/l (standard: 23.697 mg/l).
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