The only way to determine if your cooling tower system is clean is Legionella testing. It gives operators and operators an opportunity to find out if their system contains high levels of Legionella. If elevated levels of bacteria are measured, owners and operators should take corrective measures to clean and disinfect the tower. 

In a technology brief, Delta Cooling Towers offers a brief overview of the three popular methods to test for Legionella: cultured samples, direct fluorescence antibody (DFA) and DNA amplification.

Click here to learn more about these testing methods.