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Water Microbiology

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How the PT trials are arranged

  • PT trials are arranged 4 times a year

  • Participants receive their samples in good time before the trial starts. The participants analyze their samples in the same 2-weeks period.

  • Participants submit their results within a final date, and receive a preliminary report approximately 2 weeks after the final date.

  • A final report is made available in approximately 5-6 weeks.

  • Due to holidays in the summer and around Christmas, the reports may be delayed.

The trial for water PT consists of 4 freeze dried ampoules of simulated water samples. The reconstituted samples are somewhat more contaminated than drinking water to make sure targets are detected. The samples contain a combination of bacteria and fungi that are suitable for the determination of the following:

  • Total plate count, 22 ºC and 36 ºC

  • Coliform bacteria

  • Thermotolerant coliform bacteria

  • E.coli

  • Enterococci

  • Clostridium perfringens

  • Pseudomonas aeruginosa

  • Moulds and yeasts


Details regarding date of the trials, registration and costs can be found here (Food MicrobiologyWater Microbiology).

What is proficiency testing?

Please contact us for more information

Nina Skammelsrud
SLP Leder/PT Manager
+47 481 80 117

Therese Lundberg
SLP koordinator/PT Coordinator
+47 945 04 182