Nephelometric Turbidity Unit (NTU) (1) A unit of measure for the turbidity of water resulting from the use of a Nephelometer and based on the amount of light that is reflected off the water. (2) The measurement for reporting turbidity that is based on the use of a standard suspension of Formazin. Turbidity measured in NTU uses nephelometric methods that depend on passing specific light of a specific wavelength through the sample. This unit is not identical to the Jackson Turbidity Unit (JTU).
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Author of the Water Words Dictionary source of text: Gary A. Horton
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