Registrations are still open for the Waters Chemical Proficiency Testing Rounds 361 – 366 for August to December 2026.

• Round 361 – Metals (Aluminium, Barium, Bismuth, Boron, Lithium, Manganese, Silver, Strontium)
• Round 362 – Total Kjeldahl Nitrogen, Total Phosphorus
• Round 363 – Physical Parameters, Anions and Cations (Total Alkalinity as CaCO3, Chloride, Fluoride, Potassium, Sodium, Conductivity, Sulphate, Total Dissolved Solids, Total Solids)
• Round 364 – Sulphate, Conductivity, pH, Turbidity, Colour
• Round 365 – Total Biochemical Oxygen Demand, Carbonaceous Biochemical Oxygen Demand, Chemical Oxygen Demand, Total Organic Carbon
• Round 366 – Total Recoverable Oil and Grease

Participating in the Waters Chemical Proficiency Testing program helps laboratories meet accreditation requirements, build confidence in reported data, verify the accuracy and consistency of results, benchmark performance against peers, and identify testing issues early.

Places are strictly limited, so register now to secure your laboratory’s participation.