Water Testing : Legionella - Who it affects

Legionnaires' Disease - The control of Legionella bacteria in water systems.

This approved code of practice applies to the control of Legionella bacteria in any undertaking involving a work activity and to any premises controlled in connection with a trade, business or other undertaking where water is used or stored and where there is a means of creating and transmitting water droplets which may be inhaled, thereby causing a reasonably foreseeable risk of exposure to Legionella bacteria.

A reasonably foreseeable risk of exposure to Legionella bacteria exists in :

1. water systems incorporating a cooling tower;
2. water systems incorporating an evaporative condenser;
3. hot and cold water systems; and
4. other plant and systems containing water which is likely to exceed 20C which may release a spray or aerosol (ie a cloud of droplets and/or droplet nuclei) during operation or when being maintained.