High biological oxygen demand indicates:

the absence of microbial pollution

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moderate microbial pollution

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the intense level of microbial pollution

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all of these

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Solution

The correct option is C the intense level of microbial pollution
Biological Oxygen Demand (BOD) refers to the amount of dissolved oxygen that aerobic organisms need in order to break down organic material in water over time. Its high value indicates the intense level of microbial pollution.

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High biological oxygen demand indicates:

The correct option is C the intense level of microbial pollutionBiological Oxygen Demand (BOD) refers to the amount of dissolved oxygen that aerobic organisms need in order to break down organic material in water over time. Its high value indicates the intense level of microbial pollution.

The correct option is C the intense level of microbial pollution
Biological Oxygen Demand (BOD) refers to the amount of dissolved oxygen that aerobic organisms need in order to break down organic material in water over time. Its high value indicates the intense level of microbial pollution.