Microbiological Sampling

Accurate Testing for Water Quality and Safety

RETAW Services Ltd provides microbiological water sampling and Legionella testing across the UK, delivering accurate analysis and clear reporting for compliance.

Microbiological Sampling Services providing Legionella sampling, water quality testing and detailed analysis across the UK to support compliance and safe water systems.

Microbiological Sampling Services
Legionella sampling UK
Water quality testing UK
Microbiological water testing
Water hygiene compliance

What are microbiological sampling services?

RETAW Services Ltd provides microbiological sampling to assess the quality, safety, and compliance of water systems. While many assume that good test results mean no further action is needed, effective control depends on a structured sampling plan and ongoing monitoring.

Sampling should always form part of a planned programme and may be required for one or more of the following reasons:

One-off sampling to confirm compliance with regulations or standards

Ad hoc verification to confirm that water remains fit for purpose

Investigative sampling to identify causes of water quality concerns

Random sampling as voluntary or economic checks on hygiene controls

Routine monitoring as part of an ongoing control or commissioning plan

How does Legionella sampling work?

Sampling for Legionella bacteria follows recognised codes of practice and requires a clear plan, competent personnel, and accredited testing. Although full standard methods, including pre-flush and post-flush samples, exist, they are often adapted to practical site requirements.

When arranging sampling, ensure that:

A sampling plan is in place
The sampler is trained and competent
Samples are transported under proper conditions
The laboratory is UKAS accredited for Legionella analysis
You have an action plan for positive results (typically 5–10% may test positive)

Our testing can include:

Legionella bacteria
Total viable counts (TVC)
Coliforms and Enterococci
E. coli
Pseudomonas aeruginosa and Pseudomonas sp.
Other opportunistic pathogens

What types of water systems can be sampled?

RETAW Services Ltd offers microbiological sampling for a wide range of water systems, including:

Drinking water systems
Spa and swimming pools
Closed water systems
Process and industrial waters

What are the responsibilities of the dutyholder or responsible person?

In line with Legionella Control Association (LCA) requirements,

Dutyholders and responsible persons must:

Maintain a valid risk assessment and written scheme of control, including sampling programmes where appropriate
Provide sufficient site information to enable the design of a suitable sampling plan
Ensure systems are accessible and safe for sampling
Participate in the review process
Notify the LCA member of any known hazards or access restrictions, such as asbestos register requirements

Related Standards and Guidance

We align every report with BS8580-1:2019, providing detailed documentation without unnecessary complexity.

Why choose RETAW Services Ltd for microbiological sampling?

We provide reliable, UKAS accredited testing with expert interpretation of results. Our reports clearly outline findings, actions, and recommendations, ensuring that your water systems meet legal and safety standards across the UK.

How do I arrange microbiological sampling?

Contact RETAW Services Ltd to schedule a sampling plan, discuss your compliance requirements, or review your current monitoring strategy. Our team operates nationwide across England and Wales.