Pre-Season Water Safety and Legionnaires' Disease Risk Assessment

1. All COLD WATER TANKS should be emptied, cleaned with a brush, and their walls painted with chlorinated water.

2. The short circuit inside cold water tanks (proximity of supply and suction lines) should be removed.

3. The interiors (inner surfaces) of all HOT WATER TANKS (boilers) should be cleaned (removal of lime scale and sediment).

4. All FILTERS connected to the water system should be dismantled for detailed cleaning and disinfection.

5. All SHOWER HEADS, shower hoses, faucet aerators, and garden irrigation sprinklers should be dismantled for detailed cleaning and disinfection.

6. Detailed cleaning and disinfection of all COOLING TOWERS should be performed.

7. Detailed cleaning and disinfection of all pool BALANCE TANKS and FILTER SANDS should be carried out.

8. Perform CHLORINE SHOCKING by adding chlorine to cold water tanks. The target free chlorine concentration is 3 ppm, with a 24-hour retention time inside the installation.

9. Increase the water temperature inside boilers to 70 ºC, then run hot water from all showers and faucets (bath, hairdresser, kitchen, etc.) in the facility for 5 minutes each at pencil thickness flow. Perform THERMAL SHOCKING.

10. Increase the water temperature inside boilers to 70 ºC, measure and record the temperature at the bottom drain valve.

11. Run hot and cold water from all faucets, showers, reservoirs, etc. inside the facility.

Record Keeping

Write all performed procedures on appropriate forms, photograph them or prepare minutes, and sign them.

Important!

The Regulation on Legionnaires' Disease Control Procedures and Principles, published in the Official Gazette dated 13.05.2015 and numbered 29354, imposes obligations on accommodation facilities. According to the regulation; responsible persons must be trained, a file containing routine preventive measures must be prepared, a water management plan must be created, and a risk assessment must be conducted.

Note: The required actions may be more than those mentioned above. The important ones are included in this reminder, and the order of importance may vary depending on the risk situation.