What does NTU turbidity mean in practice?
The nephelometer evaluates the light scattered by particles, and the result also depends on their size, shape and color.
When does it matter?
High turbidity stresses filters and may shield microorganisms from UV or disinfectant.
Which solutions are related to it?
The sample is measured free of bubbles and sedimentation, and the cause is identified by filtration, observation of the sediment, and further testing.