Legionella Risk - Appointment of Contractors for Local Authorities

by Water Hygiene Centre, on 21-06-2023
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This blog looks at the considerations any local authority should make in determining how to appoint a contractor/contractors to support them to ensure that water systems are free from microbiological contamination for those who use them.


The appointment process will involve the procurement teams to help ensure that the appointed contractors have the necessary insurance and have good financial standing. The technical considerations may require support from the maintenance/estates/compliance teams employed within a local authority. If you are one of these people, how involved are you in the process and are you happy with the outcomes?


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Are you compliant? - ACoP L8 and HSG 274

From our experience, the single biggest failure that leads to lower levels of compliance with, for example, ACoP L8 and HSG 274, is a lack of a defined scope of works for the contractor/contractors. One way to prevent this within your local authority is to develop a robust scope of work so that the contractor(s) understand what you need support with and how to achieve this.


Legionella Risk Assessment

For instance, it is common for Legionella risk assessments to be outsourced to specialist contractors rather than completed by staff directly employed by the local authority. In this example, when developing the Invitation to Tender [ITT] or one-stage tender document, start with the end in mind i.e., what do you expect them to deliver to you after the works? 

  • In what format do you expect the reports; do you use any specific software packages which their reports feed? 

  • Do you want full engineering drawings or is a simple visual schematic representation of the water system design enough?

  • Is this an assessment of the risk of the proliferation of legionella bacteria only? Do you want them to consider the risk of other bacteria growing such as coli, coliforms, or Pseudomonas aeruginosa?

  • Do you want them to assess all assets and water systems on-site and produce an asset register at the end?
  • Do you expect them to carry out a scald risk assessment as part of their work?

  • How does your organisation classify risk? Low / Medium / High / Imminent? A 5x5 risk matrix where you get an average score?

  • What evidence will you accept to prove the Legionella Risk Assessor is competent to be carrying out the works?

  • Do you want them to collect water samples? If so where from, for what reason, and what bacteria should the lab be looking for (and hopefully not find!)?

  • How quickly do you want them to complete the work and what is your expectation on the turnaround from when the Legionella Risk Assessor is on-site to when you receive the final report(s)?

  • Do you have any Key Performance Indicators (KPIs) that you are going to use to judge their performance and do they understand what these are and why these have been selected?


Mechanic - Local Authority BlogAs you can see from this list, as a start and by no means exhaustive, not all Legionella Risk Assessments are the same. There is no one set of specification documents that you can produce and then copy and paste for every future project. This holds for every other type of work you may employ contractors to complete. Insufficient detail in your specification means a greater likelihood that you don’t get what you want to help prove you are compliant with legislation and guidance.


Our advice to ensure a successful project would always be to take the time at the start and make sure your contractor management process is robust enough not to leave you exposed to unnecessary risks.


Water Safety Audit

The Water Hygiene Centre audit processes, procedures, and record-keeping systems all form an integral part of the annual water safety audits we complete on behalf of our clients. Once areas of non-compliance are identified, action plans need to be put in place to ensure we do things better in the future.


If you are interested in having an independent audit carried out on your organisation, including the role the contractors play in supporting you, please contact us HERE.


Editor’s Note: The information provided in this blog is correct at the date of original publication – June 2023 [Original date of publication December 2021]

© Water Hygiene Centre 2023


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About the author

Water Hygiene Centre

The Water Hygiene Centre was established in 2009 to address the lack of independent water hygiene consultancy within the industry. From our humble beginnings, we have established ourselves as a market leader, helping clients identify and minimise the risk of waterborne contamination and disease, whilst improving compliance performance.

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