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What amount of BOD indicates high water pollution?(a) 4000mg/liter(b) 400mg/liter(c) 40mg/liter(d) 4mg/literThe question was posed to me during an interview for a job.My query is from Environmental Issues in chapter Environmental Issues of Biology – Class 12

Answer» RIGHT option is (a) 4000mg/liter

For explanation I would SAY: BOD is the dissolved oxygen is UTILIZED by microbes in DECOMPOSING the organic wastes of water. When the amount of BOD is more than equal to 4000mg/liter, it indicates high water pollution.


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