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Water Microbiology (QWAS)

Our Quality in Water Analysis Scheme (QWAS) has been specifically developed for the microbiological analysis of waters and effluent sludge. Microorganisms occur in water naturally and the majority are relatively harmless; however, contamination of water from faecal sources can lead to large outbreaks of disease.
In many countries, water microbiology is the subject of legislation. Regulations specify how often water sources are sampled, how sampling is done, how analysis will be performed, for which microorganisms to test, and the acceptable limits for the target microorganisms. For laboratories responsible for the analysis of waters, participation in a relevant LGC Proficiency Testing scheme can provide confidence that results of these analyses and the equipment used to produce those results are meaningful and accurate which, in turn, helps to ensure water safety.

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{{ "Please see individual products for specific accreditation status" | truncate(70) }} See our accreditations

ISO/IEC 17043
ISO 9001

Scheme Information


Despatch Date

Reporting Deadline


11 February 2019

08 March 2019


11 March 2019

05 April 2019


08 April 2019

03 May 2019


13 May 2019. 07 June 2019


10 June 2019

05 July 2019


08 July 2019

02 August 2019


09 September 2019

04 October 2019


14 October 2019

08 November 2019


11 November 2019

06 December 2019


09 December 2019

03 January 2020

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