WHAT IS THE PARAMETERS TO MEASURE THE WATER QUALITY?

The parameters which are used to identify the quality of water are called water quality parameters. Here four types of parameters are given below.

1. Physical parameter :

• Temperature
• Color
• Odour
• Taste
• Turbidity
• Total suspended solid
• Dissolve solid

2. Chemical parameter :

• Alkalinity
• Ph value
• Hardness
• Heavy metals
• Biological oxygen demand
• Chemical oxygen demand
• Oil and grease
• Dissolved oxygen : Oxygen is available in water in dissolved condition. This is called DO. The concentration of DO is depends upon the pressure, temperature and other physical , chemical and biochemical condition of water.
• Following points reveal the importance of DO as parameter.
• The DO test is basis of BOD test.
• Oxygen is an important factor in corrosion. The DO test is used to control the amount of oxygen.
• In liquid waste, DO is the factor to complete biodegradable process by organisms.
• BOD test
• COD test

3. Biological parameter :

• The presence of E-coli in water usually with the help of most probable number MPN is the example of biological parameter.

4. Radiological parameter :

• The presence of radioactive particles in water is the example of radiological parameter.