Control of low Legionella concentrations in pool water

The Legionella proof is necessary in pool water according to DIN 19643 in c ase of possible aerosol formation. In lab tests it was proven that the dire ct spatulation of I ml water offers high-grade proof with high correlation of the determined concentration to the actual germ content. With very small germ concentrations, however, preceding Filtration of larger sample volume s is necessary. During the investigation of routine samples a Legionella pr oof was possible thereby in individual cases, whereas direct spatulation re mained negative.