Home » UPSC IAS » Biological Oxygen Demand (BOD) is a standard criterion for

Biological Oxygen Demand (BOD) is a standard criterion for

June 1, 2025 by rawan239

Biological Oxygen Demand (BOD) is a standard criterion for

Measuring oxygen levels in blood

Computing oxygen levels in forest ecosystems

Pollution assay in aquatic ecosystems

Assessing oxygen levels in high altitude regions

This question was previously asked in

UPSC IAS – 2017

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The correct answer is C) Pollution assay in aquatic ecosystems.

Biological Oxygen Demand (BOD) is a measure used to indicate the amount of dissolved oxygen consumed by microorganisms in a water sample while they decompose organic matter under aerobic conditions. It is a standard test for assessing the level of organic pollution in water bodies.

High BOD values indicate that there is a large amount of biodegradable organic material in the water, which consumes a significant amount of dissolved oxygen as it decomposes. This depletion of oxygen can harm aquatic life. Therefore, BOD is a crucial parameter in evaluating the quality of water and the extent of pollution in rivers, lakes, and other aquatic ecosystems. Options A, B, and D relate to oxygen levels in blood, forests, or high altitudes, which are not measured by BOD.

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