High BOD indicates what about water quality?

High BOD indicates what about water quality?

• A. High water quality
• B. Low water quality
• C. Neutral
• D. No relation

Answer: (B)

Biochemical Oxygen Demand (BOD) shows how much oxygen microbes need to break down organic matter in water. When BOD is high, a lot of organic pollution is present, so microbes consume a large amount of the dissolved oxygen (DO) in the water to decompose it. That drops the DO available for fish and other aquatic life, creating stressful or dead conditions for organisms and signaling poorer water quality overall. So a high BOD is a warning that the water is degraded by organic pollution. Conversely, a low BOD indicates less organic matter and better oxygen balance, reflecting cleaner water.

Biochemical Oxygen Demand (BOD) shows how much oxygen microbes need to break down organic matter in water. When BOD is high, a lot of organic pollution is present, so microbes consume a large amount of the dissolved oxygen (DO) in the water to decompose it. That drops the DO available for fish and other aquatic life, creating stressful or dead conditions for organisms and signaling poorer water quality overall. So a high BOD is a warning that the water is degraded by organic pollution. Conversely, a low BOD indicates less organic matter and better oxygen balance, reflecting cleaner water.