Below 1 NTU is the target for drinking water. High turbidity clogs membranes and resins and reduces the effectiveness of UV disinfection. It is removed by multimedia filtration, coagulation and UF. For RO feed, turbidity < 1 NTU and SDI < 5 are required.
Technical glossary· Water quality and measurement
Turbidity (NTU)
Short definitionA measure of clarity based on the scattering of light by particles suspended in water; expressed in NTU.
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