Nephelometric turbidity units definition
Nephelometric turbidity units or “NTUs” means the units used to describe turbidity. Nephelometric refers to the way the instrument, a nephelometer, measures how much light is scat- tered by suspended particles in the water.
Nephelometric turbidity units or “NTU” means a measure of turbidity based on a comparison of the intensity of the light scattered by the sample under defined conditions with the intensity of the light scattered by a standard reference suspension under the same conditions.