Nephelometric Turbidity Units (NTU) are most commonly used to measure what?

Nephelometric Turbidity Units (NTU) are specifically designed to measure the turbidity of a liquid, which refers to the cloudiness or haziness caused by large numbers of individual particles that are generally invisible to the naked eye. This measurement is crucial in assessing water quality, particularly in natural bodies of water and treated water supplies. NTU represents the extent to which light is scattered by particles suspended in water when a light beam is passed through it.

Turbidity is important for various reasons, including its effects on aquatic life, as well as its implications for water treatment processes. High turbidity levels can indicate the presence of pollutants, sediments, or microorganisms, making it a key parameter to monitor in environmental health and water quality assessments. Thus, the use of NTU as a standardized measurement for turbidity is essential for ensuring that water meets health and safety standards.