Legionella assessment 2026

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The document is a Legionella Environmental Assessment Form provided by the Centers for Disease Control and Prevention (CDC). It serves as a tool for public health officials to evaluate water systems in various facilities, aiming to minimize the risk of legionellosis. The form includes detailed instructions for on-site assessments, guidelines for measuring water parameters, and specific questions regarding facility characteristics, water supply sources, and plumbing systems. It emphasizes the importance of understanding conditions that promote Legionella growth and provides appendices for additional information on healthcare facilities, cooling towers, spas, and recent construction activities.

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Click ‘Get Form’ to open it in the editor.
Begin by entering your personal information in the 'Person(s) completing the assessment' section. Ensure all fields are filled accurately, including names, job titles, organization, and contact details.
In the 'Assessment details' section, provide the facility name, date of assessment, and address. This information is crucial for identifying the location being assessed.
Proceed to the 'Facility Characteristics' section. Answer each question thoroughly. If a question does not apply, write 'N/A'. For applicable questions that cannot be answered, provide an explanation.
Continue filling out sections regarding water supply sources and premise plumbing systems. Document any measurements taken during your assessment as instructed.
Finally, review all entries for accuracy before saving or exporting your completed form. Utilize our platform's features to ensure a smooth submission process.

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Got questions?

We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

How often should Legionella training be carried out?

Neither Regulations nor current guidance indicate specific time frames for refresher training and depending on the role of an individual this will vary refreshers are commonly every 2 or 3 years. Operational training perhaps may be more frequent than for those staff in strategic roles.

What does it mean when Legionella is positive?

This indicates a high level of bacteria whereby immediate remedial action must be taken to prevent a potential outbreak of Legionnaires disease.

How do you test for Legionella?

The UAT is the most commonly used laboratory test for diagnosis of Legionnaires disease. It detects a piece of the Legionella bacterium (known as an antigen) in . It can detect Legionella infection in some cases for days to weeks (or longer, under rare circumstances) after treatment.

What is the CDC recommendation for Legionella testing?

Best practice is to obtain both a lower respiratory specimen for culture or molecular testing and for the urinary antigen test concurrently. Urinary antigen testing typically detects only one type of Legionella, although infections with other types occur.

How often do you need to test for Legionella?

For open systems, such as cooling towers, evaporative condensers and spa pools etc, routine testing should be carried out at least quarterly. However, there may be circumstances were more frequent sampling may be required.

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What is the first step in a risk assessment for Legionella?

Recognised by safety regulators as the essential first step in any workplace Legionella risk management programme, the assessment involves: Inspecting water systems to identify vulnerabilities. Identifying risk factors, such as stagnant or dirty water and inadequate temperature control.

When does the Legionella certificate expire?

Certificates are valid for 5 years. Candidates are eligible to undertake re-assessment up to 6 months prior to the expiry date of the initial certificate. Previous certificates must be presented to the assessment centre as evidence.

How often should a Legionella assessment be done?

With simple buildings where the risks are low we recommend that the basic rule of thumb is to review your risk assessment every two years, or sooner if there is a docHub change.