Legionella Water Sampling

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Verify Water Quality and Demonstrate Ongoing Compliance Between Risk Assessments

Legionella and Pseudomonas sampling provides laboratory confirmation that water systems remain safe and compliant between formal risk assessments. Conducted by NEBOSH-certified assessors and analysed by UKAS-accredited laboratories, the service validates the effectiveness of your ongoing control regime. Testing can be targeted to key outlets, sentinel points, or specific high-risk areas, with results interpreted and reported alongside professional recommendations.

Why It Matters — and What You Risk Without It

Without regular water testing, you risk:

Hidden bacterial growth in outlets or storage systems
Exposure of occupants to contaminated water
Non-compliance with ACOP L8 and HTM 01-05
Loss of assurance for clients, regulators, or insurers

What's Included

Sampling from agreed sentinel outlets and water sources
UKAS-accredited laboratory analysis for Legionella and Pseudomonas
Certified results with interpretation and recommendations
Guidance for corrective action or further investigation

On-site sampling by a NEBOSH-certified assessor
Same-day sample delivery to accredited laboratory
Certificate of results issued within seven working days
Optional integration with full Legionella Risk Assessment

Property owners, landlords, and managing agents
Facility and estates managers
Healthcare and clinical environments
Schools, universities, and public buildings

Certified laboratory analysis with professional interpretation
Evidence of ongoing water safety management
Assurance of compliance with national standards

Frequently Asked Questions

How often should Legionella water sampling be carried out?

Sampling frequency depends on your risk assessment and system type. Quarterly sampling is common for many buildings, with more frequent testing for healthcare or high-risk environments.

What is the difference between a risk assessment and water sampling?

A risk assessment evaluates system design, management and control measures. Water sampling provides laboratory confirmation that water quality meets safe standards between assessments.

What happens if Legionella is detected?

Results are interpreted and reported with clear recommendations for corrective action, which may include disinfection, flushing, or further investigation depending on the level detected.

Is Pseudomonas testing included?

Yes, Pseudomonas testing can be included alongside Legionella sampling, particularly for healthcare and clinical environments where HTM 01-05 compliance is required.

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