ISO 7027-2:2019

Current Revision
Water quality - Determination of turbidity - Part 2: Semi-quantitative methods for the assessment of transparency of waters

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ISO 7027-2:2019

Water quality - Determination of turbidity - Part 2: Semi-quantitative methods for the assessment of transparency of waters

PUBLISH DATE 2019
ISO 7027-2:2019

This document specifies the following semi-quantitative methods for the assessment of transparency of waters:

  • a) measurement of visual range using the transparency testing tube (applicable to transparent and slightly cloudy water), see Clause 4;
  • b) measurement of visual range in the upper water layers using the transparency testing disc (especially applicable to surface, bathing water, waste water and often used in marine monitoring), see 5.1;
  • c) measurement of visibility by divers in a destined depth, see 5.2.

NOTE The quantitative methods using optical turbidimeters or nephelometers are described in ISO 7027-1.

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