Which is the following quality being high values of drinking watera.Chemical oxygen demandb.Dissolved oxygenc.Conductivityd.Biochemical oxygen demand

The quality of drinking water is often determined by several factors, including Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), Conductivity, and Biochemical Oxygen Demand (BOD).

a. Chemical Oxygen Demand (COD): This is a measure of the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and Nitrite. High values of COD are usually not good for drinking water as it indicates high levels of pollutants.

b. Dissolved Oxygen (DO): This is the amount of oxygen dissolved in water. High levels of DO are generally good as it is essential for the survival of fish and other aquatic life. For drinking water, it's not harmful but it's not a significant factor in determining water quality.

c. Conductivity: This is a measure of water's ability to conduct electricity, which is directly related to the concentration of ions in the water. High conductivity indicates high levels of dissolved salts (ions), which is not good for drinking water.

d. Biochemical Oxygen Demand (BOD): This is the amount of oxygen required by aerobic microorganisms to decompose the organic matter in the water. High BOD values are not good for drinking water as it indicates high levels of organic pollution.

In conclusion, for drinking water, high values of Dissolved Oxygen (DO) are generally considered good. However, high values of Chemical Oxygen Demand (COD), Conductivity, and Biochemical Oxygen Demand (BOD) are not desirable as they indicate pollution.