What you must know:

  • Legionella regulatory change expected by the end of 2017
  • All cooling tower systems will require a risk management plan (RMP) that is audited annually
  • Monthly sampling of Legionella and HCC will be required

A number of Legionnaires’ outbreaks occurred across Sydney in 2016. As a consequence, NSW Health instituted a public health investigation which found the management practices of cooling towers wanting. Recognising the need for regulatory change, NSW Health formed an expert panel comprised of AIRAH, risk management experts, state and local government, environmental health officers and microbiologists. A number of recommendations made by the panel were put to industry in the form of a consultation paper at the end of 2016.

Fifty-three submissions commenting on these recommendations were received from industry, office of local government, public health units, property managers and individuals. Clearly, this topic is of significant concern for many and has stimulated enormous discussion.

A Legionella steering committee, overseeing four working parties, has recently responded to these submissions to advise NSW Health how best to proceed in the implementation of these changes and to develop resources to support the implementation.

For each cooling tower system, the following is proposed:

  • A RMP, based on AS 3666 part 3, must be developed for every system.
  • The RMP will have to be prepared by a “competent person” and reviewed every 5 years.
  • An annual audit of the RMP by a certified 3rd party to confirm that recommendations have been implemented.
  • The annual audit certificate is to be lodged with local government.
  • Monthly sampling of cooling tower systems for Legionella and heterotrophic bacteria
  • A unique identifying number for every cooling tower system. Each system must be registered annually to ensure registrations remain current.
  • Mandatory reporting to local government of any test result that exceeds 1,000 CFU/mL Legionella or 5,000,000 CFU/mL HCC
  • The definition of a ‘competent person’ will change and will be based on the function or role of the individual and not the tertiary qualifications.
  • The current requirement for a “Certificate of Disinfection” will be discontinued and will be replaced by certification of the RMP.

NSW Health is still to define a number of elements:

  • Whether a focus on high-risk locations (eg. CBD, shopping centres, hospitals, aged care) will be part of the package
  • The time-frame for transition from the current framework
  • Details regarding the “up-skilling” of the current and future workforce considering the substantial changes and increased workload proposed within a short transition period
  • How the framework will be standardised across NSW given the regulatory compliance (including registers and inspections) are manged by local government
  • The implementation of state-wide geographical mapping system of cooling tower systems to improve the response to outbreaks in the future

Legionella in Sydney

Interestingly NSW Health has proposed the potential for the development of a statewide cooling tower register and database to capture all locations, results, notifications and actions. The database would need to be fully customised to meet the regulatory record-keeping requirements and would be designed to streamline workflows and minimise burden on local government. The burden for entering this data will fall on the owners of the regulated cooling tower and likely would form a part of the contract of the water treatment provider. Local governments’ Environmental Health Officers will continue to play an important role undertaking physical inspections of cooling towers.

Given the political pressure and the need to take action, regulatory change will take place this year – with the potential to develop a database further down the track. To support the implementation of these regulatory changes the NSW Health working parties will produce the following:

  • Model RMP Development of this is being led by renowned cooling tower risk management expert Clive Broadbent. There will be substantial alignment with the Victorian risk management plan, but it will also account for demographic differences between the two states;
  • Guidelines on undertaking and implementing a cooling tower RMP;
  • Training for auditors, competent persons, environmental health officers and water treatment industry personnel;
  • targeted consultation process will be undertaken with industry to ensure these resources are practical and meaningful.

Critically NSW Health aims to build a fully redundant model, whereby responsibility for the health of the cooling towers and the risk they present to the public are shared by the building owner, the auditor and the water treatment company. Prevention will be the main focus and the framework will enable all parties to demand that each meet their obligations. NSW Health aims to ensure all operations are providing a minimal standardised service that genuinely mitigates the risk.

Click here to see the state-by-state Legionella legislation.