Which of the following parameters is used to indicate the clarity of water?

Turbidity is the parameter that specifically measures the clarity of water. It refers to the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye. This can include a variety of substances such as sediment, algae, and other organic materials.

Measuring turbidity is important because high levels can indicate pollution or excessive nutrient loading in water bodies, which can adversely affect aquatic life and water quality. Clean water typically has low turbidity levels, meaning it is clear and has fewer suspended particles, thereby allowing light to penetrate and supporting a healthier ecosystem.

In contrast, pH level indicates the acidity or basicity of water, conductivity measures how well water conducts electricity (often related to the concentration of ions), and dissolved oxygen quantifies the amount of oxygen available for aquatic organisms. While all these parameters are important for assessing water quality, turbidity is directly linked to clarity.