chemical oxygen demand

Chemical Oxygen Demand (COD) is a measure that indicates the amount of oxygen required to break down organic and inorganic materials in water using chemical reactions. It serves as an important indicator of water pollution and the health of aquatic ecosystems. A higher COD value means more pollutants are present, which can be harmful to fish and other wildlife. COD testing is commonly used in wastewater treatment to assess the effectiveness of treatment processes and ensure that the discharged water meets environmental regulations. Reducing COD is crucial for maintaining clean water resources.