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TURBIDITY METHODS and MEASUREMENT
3.1 Introduction
The IESWTR requires systems to measure the turbidity of combined filter effluent and
individual filter effluent. Because these measurements are used for reporting and
compliance purposes (as described in Chapter 2), accurate measurement and strict
adherence to approved methods is of paramount importance. The following chapter
describes approved methods, analytical issues associated with turbidimeters, quality
assurance and quality control issues, and data collection and management.
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Last download: Fri Jan 20, 2012 05:46:01 PM
25
timesThe Turbidity Tube: Simple and Accurate Measurement of Turbidity in the Field
Turbidity is an important water quality parameter in drinking water provision and treatment.
The equipment typically used to measure turbidity can be quite expensive, and often provides results
which are more precise and accurate than necessary. This high cost is a barrier to many projects in
the developing world. In this paper, we will present the turbidity tube as an alternative device to
measure turbidity. A turbidity tube can be purchased commercially, or can be constructed at an
extremely low cost using a wide range of locally available materials. It is particularly well-suited to
situations when decisions can be made based on approximate turbidity (rounded to the nearest 5
NTU). We give a brief discussion of what turbidity is, how a turbidity tube is constructed, and how
to use it properly.
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Last download: Fri Jan 20, 2012 05:46:11 PM
