SM17: Welcome News on Control of Legionella, an Unwelcome Contaminant

Clive Broadbent, Clive Broadbent & Associates

Recent outbreaks of Legionnaires’ disease in Sydney and Melbourne CBDs have highlighted the need for interventions to firmly address building services design and maintenance practices. Relevant regulatory authorities are playing their part, most recently with the introduction of new rules in NSW covering cooling towers. Case numbers have recently escalated in the USA and again there has been a response from industry and regulators.

It’s not all about cooling towers; the ageing population now presents challenges associated with potable water systems particularly at hospitals and aged care facilities.

All such involvements need to start with an appreciation of bacterial growth factors and the fundamentals of control practices for Legionella, the causative agent for this disease.

This session will describe those systems most at risk and outline control mechanisms proven to be effective. The changes to regulations – including the need to apply risk management principles – will be briefly described.


Clive Broadbent AM, F.IEAust, F.AIRAH, F.ASHRAE, is a Canberra-based engineering consultant specialising in preventive measures for Legionnaires’ disease and other building microbial control issues. He chairs the committee that developed the Australian AS/NZS 3666 suite of standards and has consulted at several outbreaks of the disease in Australia and New Zealand. His work has included a four-year field research study into the ecology of Legionella in 84 cooling towers. Clive is a voting member on ASHRAE committees involved with relevant standards and guidelines.


Note: The seminar program may be subject to change. If you have registered for this seminar any topic, presenter, timetable or price changes will be communicated as soon as possible prior to the event.