An environmental water sample may need to be diluted in order to obtain a reliable turbidity reading. The turbidity of the original sample can be calculated based on the dilution and the turbidity reading of the dilution.



(1) turbidity of the diluted sample in units (such as NTU)

(2) volume of environmental sample in mL

(3) volume of distilled water added to the sample to obtain the dilution in mL


turbidity of the original specimen in units =

= (turbidity of the diluted sample) * ((volume of environmental sample) + (volume of distilled water)) / (volume of environmental sample)


This is equivalent to:


(turbidity of dilution) / (final volume of diluted sample) =

= (turbidity of orignal sample) / (volume of undiluted sample)


To read more or access our algorithms and calculators, please log in or register.