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

The quality of drinking water is often determined by the level of Dissolved Oxygen (b). High levels of dissolved oxygen are generally a positive indicator of water quality.

Here's why:

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 COD levels mean a large amount of substances in water that can consume oxygen, which is not good for drinking water.

b. Dissolved Oxygen (DO): This is the amount of oxygen dissolved in water. High levels of DO are good because oxygen is necessary for life, including aquatic life. It's also a sign that the water is healthy and clean.

c. Biochemical Oxygen Demand (BOD): This is the amount of oxygen required for microbial metabolism of organic compounds in water. High BOD means there is a lot of organic matter that bacteria are breaking down, which consumes oxygen that could otherwise be used by aquatic organisms. High BOD is a bad sign for drinking water.

d. Conductivity: This is a measure of water's ability to conduct electricity, which is influenced by the presence of inorganic dissolved solids such as chloride, nitrate, sulfate, and phosphate anions (ions that carry a negative charge) or sodium, magnesium, calcium, iron, and aluminum cations (ions that carry a positive charge). High conductivity means high mineral content, which may or may not be good for drinking water depending on the specific minerals present.