Legionella Water Testing
Safeguarding Your Water Systems and Your People
- High Standards
- Honesty
- Quality Materials
Here at Croston Plumbing & Heating, we offer a range of Legionella water testing services to our domestic and commercial customers across the North West.
We operate in a number of different sectors and our existing clients include: residential premises, hotels, schools, nurseries, health centres, restaurants, leisure centres, care homes, dental surgeries, office complexes, factories, warehouse/distribution centres and private residential properties.
What is Legionnaires disease?
Legionnaires’ disease is a potentially fatal form of pneumonia caused by inhaling tiny droplets of water containing legionella bacteria. These bacteria thrive in purpose-built water systems where temperatures are ideal for growth—typically between 20–45°C.
Outbreaks are entirely preventable with proper testing, treatment, and monitoring, which is where our expert services come in.
What are legal obligations?
If you’re a landlord, business owner, or responsible for a building’s maintenance, you may be legally required to carry out regular Legionella water testing—especially if there are water storage tanks, cooling towers, or infrequently used outlets.
While a full Legionella risk assessment must be carried out by a dutyholder or specialist, Croston Plumbing & Heating supports that process by offering certified water sampling and testing services, helping you monitor and manage the risk.
Our Legionella Testing Service Includes:
✅ Site visit to collect water samples from key outlets (taps, showers, tanks, etc.)
✅ Testing of samples by an accredited UKAS laboratory
✅ Clear and easy-to-understand results, including any positive findings
✅ Guidance on the next steps if bacteria is detected
✅ Optional routine testing schedules to help ensure ongoing compliance
Legionella Risk Assessments
If you need a Legionella Risk Assessment for your commercial space or rental property, CPH can help! We partner with The First Principle and their fantastic team to carry out comprehensive Legionella Risk Assessments.
- How does it work?
If you need a Legionella Risk Assessment, we’ll introduce you to The First Principle and direct you to arrange a Legionella Risk Assessment for your premises. - Consultation – The First Principle will carry out an initial consultation to discuss your specific requirements and provide an overview of their services and a quotation.
- Site Visit & Assessment – The First Principle will visit your premises to conduct a detailed assessment of your water systems.
- Analysis & Reporting – The data collected during the inspection will be analysed and a comprehensive report will be produced with practical recommendations and remedial works indicated.
- Remedial Works & Support – Once you have received your comprehensive report from The First Principle and shared this with CPH, we’ll provide a quotation for carrying out any remedial works required and help you protect your premises from Legionella.
Your Water Hygiene & Legionella Risk Assessment will include:
- Summary of Overall Risk Rating
- Site/Building Overview
- Schematic Drawings
- Risk Assessment Executive
- Summary and Risk Rating (Risk Conclusion)
- Recommendations
- Risk Assessment Survey Data:
o Management Overview
o Other Risk Systems
o Domestic Hot and Cold Water - Written Scheme/Monitoring Programme Evaluation
- Photographic Evidence
Legionella Tests
Croston Plumbing & Heating can carry out a Legionella Test in your private or commercial property. CPH will attend and carry out water testing with quick results, testing for the presence of legionella.
How much does a Legionella Test cost?
Domestic Properties: £180.00 + VAT
Commercial/Rental Properties: £360.00 + VAT
How to reduce the risk of Legionella
Identify and assess the potential risk
The first step towards ensuring your property is safe from Legionnaire’s disease is to identify and assess the risk of Legionella. It is a legal duty for Landlords to assess the risk of Legionella exposure in their properties, and also to control this risk.
Respond and manage the risk
Once the risk of Legionella in your property has been identified and assessed, the second step in the process is to begin the process of managing the risk. This will involve implementing the recommendations from the risk assessment, selecting contractors to maintain the system and arranging for routine monitoring as required.
Prevention & control
It is important to note that the spread of Legionnaire’s disease is very much preventable. The best way to prevent Legionella is to reduce the amount of stored water. Where the risk cannot be prevented through elimination it must be adequately controlled. One of the main ways to do this is to control the temperature.
Record your activity
If you have had a risk assessment completed you must keep a record of it so that you can evidence the actions taken to eliminate or reduce the risk. Maintaining a water log book for the building can be a useful way of recording water temperatures and other checks to demonstrate that you are managing risks appropriately.