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What does the term "BOD" (Biochemical Oxygen Demand) refer to in sewage analysis?

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Think of BOD as an indirect measure of biodegradable organic pollution: high organic load $\rightarrow$ high bacterial activity $\rightarrow$ high oxygen consumption (BOD).
Updated On: Jul 9, 2026
  • The amount of oxygen needed by aquatic organisms
  • The rate of bacterial growth in sewage
  • The oxygen content in fresh water bodies
  • The amount of oxygen required by bacteria to decompose organic matter in sewage
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The Correct Option is D

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