May take decades to clean Ganga water, say experts

The dissolved oxygen level, or the amount of oxygen available to living aquatic organisms, has improved at 27 locations and the biochemical oxygen demand (BOD), the amount of oxygen consumed by bacteria while they decompose organic matter, and faecal coliform (FC) content, a measure of the suitability of water for consumption, has improved at 42 and 21 locations, respectively.

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