BS EN 13623:2020

BS EN 13623:2020 Chemical disinfectants and antiseptics – Quantitative suspension test for the evaluation of bactericidal activity against Legionella of chemical disinfectants for aqueous systems – Test method and requirements (phase 2, step 1)

EN 13623:2020 is a suspension test for establishing whether a chemical disinfectant has a bactericidal activity against Legionella pneumophila for aqueous systems, such as for water treatment products.

Proliferation of Legionella only occurs in waters under certain conditions, and predominantly poses a risk when aerosolised. Many systems containing water do not require treatment. A decision to add chemical disinfectants to any water should be based on an appropriate assessment according to national regulations.

If the product complies with the requirements of this standard, it can be considered bactericidal against Legionella pneumophila, but it should not necessarily be inferred that the product is acceptable for a specific site of application without consideration of other relevant factors such as the pH, water, chemistry, temperature, and degree of biological fouling at that site of application. It does not take into account the protective effect conveyed by biofilm on the organisms.