An important part of a cooling water treatment program is maintaining a routine cleaning schedule. Cooling Towers act as air washers, and as such, bring in many contaminants and foulants that can drop out in low-flow areas of cooling towers. These contaminants can act as food for biological species, which may contribute to biofilm and a higher risk associated with Legionnaires Disease.

Twice-a-year cleaning is recommended by the AWT, CDC, CTI and ASHRAE as a routine, scheduled maintenance procedure. HPE can provide this service or provide cleaning procedures and consultation for the owners' personnel.