Home » How is the amount of biodegradable organic matter in sewage water estimated? Water Pollution MCQs How is the amount of biodegradable organic matter in sewage water estimated? September 22, 2022 2 Views Q. How is the amount of biodegradable organic matter in sewage water estimated? Chemical Oxygen DemandPhysical Oxygen DemandBiological Oxygen DemandMathematical Oxygen Demand Answer: Biological Oxygen Demand