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EMSD announces latest sampling results for legionella at fresh water cooling towers

     The Electrical and Mechanical Services Department (EMSD) today (June 7) announced that the department tested 89 water samples collected from cooling towers in 84 buildings in its routine inspections in May this year. Two samples were detected to have a total legionella count at or above the upper threshold, which is 1 000 colony-forming units per millilitre. The latest statistics are set out in the Annex 1.

     The cooling towers in which the two samples were collected in May are located at 36-42 Shan Mei Street, Sha Tin, and 50 Po Heung Street, Tai Po. The EMSD has issued nuisance notices under the Public Health and Municipal Services Ordinance to the owners of the cooling towers requiring appropriate disinfection work to be done. Disinfection of the cooling towers in these two cases is being arranged by the owners. Details of these two cases can be found in Annex 2. The EMSD publishes the latest statistics of the above information on a half-monthly basis on its website (

     The EMSD reminds the owners of fresh water cooling towers that they have the responsibility to design, operate and maintain cooling towers properly. They should arrange regular inspections, timely maintenance and periodic testing of the water quality in their cooling towers in accordance with the Code of Practice for Water-cooled Air Conditioning Systems issued by the department to prevent the proliferation of legionella.

Ends/Tuesday, June 7, 2016
Issued at HKT 14:00


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