Legionella Risk Assessment
Legionella is a naturally occurring bacteria found in many natural water courses; rivers, lakes and resevoirs. The bacteria only becomes a problem when it experiences the right conditions for rapid growth and this means an increase in temperature which is common within the workplace.
For examples;
- Water systems incorporating a cooling tower.
- Water systems incorporating an evaporative condenser.
- Hot and cold water systems.
- Other plant systems containing water which is likely to exceed 20°C and which may release a spray or aerosol during operation or when being maintained. This also includes showers / taps etc.
Under health and safety law, you must assess the risks from legionella bacteria that may affect your staff / residents or members of the public and take suitable precautions to reduce all risks to a minimum this process is known  as legionella risk assessment.
As an employer or a person in control of the premises (e.g. a landlord), you must:
- Identify and assess sources of legionella bacteria risk.
- Prepare a scheme, (or course of action), for preventing or controlling the risk of legionella within your premises.
- Implement and manage the legionella control scheme.
- Appoint a person to be responsible for your legionella testing, design and management of your action or management plan.
- Keep records and check that precautionary systems are effective, (continued legionella monitoring).
- If appropriate, notify the local authority that you have a cooling tower(s) on site.
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