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WorksheetsWater Hygiene & Legionella – Worksheet Extraction
Total questions: 13
Worksheet time: 7mins
What is the main purpose of good water hygiene in buildings?
To improve water taste
To reduce water usage
To prevent the growth of harmful bacteria
To increase system pressure
Which bacteria is most commonly associated with poor water hygiene in buildings?
E. coli
Salmonella
Legionella pneumophila
Campylobacter
At what temperature should hot water normally be stored to help control Legionella growth?
40°C
50°C
55°C
60°C or above
Cold water should be stored and distributed at what maximum temperature?
Below 10°C
Below 15°C
Below 20°C
Below 25°C
Which condition most encourages the growth of Legionella bacteria?
High water pressure
Fast-flowing water
Water stagnation
High chlorine levels
What is a “dead leg” within a water system?
A section of pipe with constant water flow
A pipe used only in emergencies
A redundant section of pipe where water can stagnate
A pipe supplying drinking water only
Which activity helps reduce the risk from low-use water outlets?
Turning off the water supply
Weekly flushing
Increasing pipe size
Reducing water temperature
What is the purpose of a Legionella risk assessment?
To test water quality for taste
To identify hazards and apply control measures
To replace old pipework
To certify drinking water supplies
Under which legislation is Legionella bacteria classified as a hazardous substance?
Building Regulations
Environmental Protection Act
COSHH Regulations 2002
Water Supply Regulations
Which document provides practical guidance on controlling Legionella risks in the UK?
British Standard 7671
Approved Code of Practice L8
Workplace Fire Safety Guide
Water Advisory Scheme (WRAS)
How is legal compliance for water hygiene typically demonstrated?
By displaying a Legionella certificate on site
By annual insurance inspections
Through documented risk assessments and monitoring records
By carrying out monthly water sampling only
Who is legally responsible for managing Legionella risks in a building?
The water supplier
Building occupants
The duty holder or employer
Local authorities only
Why is temperature monitoring considered a key control measure for Legionella?
It improves water pressure
It increases energy efficiency
It helps prevent conditions where bacteria multiply
It removes scale from pipework
