Which of the following statements concerning the biochemical oxygen demand (BOD) is correct?

Question

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The biochemical oxygen demand (BOD) is a measure of the amount of dissolved oxygen in water required by aerobic microorganisms to decompose organic matter into carbon dioxide, water, and other organic compounds. It is used to determine the amount of organic pollutants in water and is a measurement of the amount of oxygen that aerobic bacteria require to fully metabolize organic wastes in water. It is not a measure of the amount of oxygen in water or a filter system to purify drinking water. It is also not proportional to how potable water is, as potability is determined by a range of factors beyond just the BOD. BOD is used as a bioreceptor index, as it indicates the level of organic pollution in water, which in turn affects the health of the aquatic environment.

Which of the Following Statements Concerning the Biochemical Oxygen Demand