DRINKING WATER: PHYSICAL-CHEMICAL C /REF. 990003/

In the following tables you can see the dates on which the rounds take place:

 

ROUND 1 ROUND 2
WEEK 12
16th March 2026
WEEK 38
14th September 2026
Barium Anionic surfactants
Beryllium Cobalt
Bicarbonates Kjeldahl Nitrogen
Calcium Magnesium
Dry residue Orthophosphates
Hardness Total Cyanides
Vanadium Total Phosphorus
Silica (Silicon dioxide)
Silver

 

You will find detailed information in our Proficiency Testing Scheme Catalogue.

You can find the guideline ranges of concentration here.

For any further information, please contact ielab at: comercial@ielab.es.