What method is used to measure the turbidity of water?

The measurement of turbidity in water is primarily conducted using nephelometric turbidity units (NTU). This method evaluates the cloudiness or haziness of water, which is caused by the presence of suspended particles. When light is directed through a water sample, it scatters as it hits these particles. The amount of light that is scattered at a specific angle is measured and converted into NTU, providing a quantifiable value for the turbidity level present in the water.

Using NTU is advantageous because it directly correlates with the visibility and concentration of particulate matter, making it widely accepted for regulatory purposes and in various water quality assessments. By utilizing this method, water treatment facilities can monitor and maintain the clarity of their water supply effectively.