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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.

 

{{ "PT Water Microbiology Accreditation" | truncate(70) }}

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

ISO/IEC 17043
ISO 9001

Scheme Information

Round Dates

Round

Despatch Date

Reporting Deadline

WT346

10 February 2025

17 March 2025

WT347

10 March 2025

14 April 2025

WT348

07 April 2025

12 May 2025

WT349

12 May 2025

16 June 2025

WT350

16 June 2025

21 July 2025

WT351

14 July 2025

18 August 2025

WT353

08 September 2025

13 October 2025

WT354

06 October 2025

10 November 2025

WT355

10 November 2025

15 December 2025

WT356

08 December 2025

26 January 2026

Scheme Documents


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