Water Microbiology (QWAS)
"Choose from 18 types of water sample with our water microbiology proficiency testing scheme"
Our QWAS Water Microbiology proficiency testing scheme is the world’s largest water microbiology proficiency testing programme, trusted by more than 1,000 participating laboratories globally. Established in 2002, it offers a comprehensive choice of 18 water samples – including potable, process, mineral, effluent sludge, industrial, surface/waste/bathing, recreational, sea, dialysis and wastewaters. In addition, it features our best-selling PT-WT-412 sample for the enumeration of E. coli, coliforms, and Enterococci (faecal streptococci).
As well as helping laboratories ensure water safety, and comply with testing regulations in a wide range of countries and regions, successful participation in QWAS can provide laboratories with confidence in their results and the equipment they use.
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{{ "Please see individual products for specific accreditation status" | truncate(70) }} See our accreditations
Scheme Information
Round Dates
Round
Despatch Date
Reporting Deadline
WT334
12 February 2024
18 March 2024
WT335
11 March 2024
15 April 2024
WT336
08 April 2024
13 May 2024
WT337
13 May 2024
17 June 2024
WT338
17 June 2024
22 July 2024
WT339
15 July 2024
19 August 2024
WT341
09 September 2024
14 October 2024
WT342
07 October 2024
11 November 2024
WT343
11 November 2024
16 December 2024
WT344
09 December 2023
13 January 2025
Scheme Documents
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