Legionella Testing Services & Management

SES provides simple, tailored legionella testing risk assessments for commercial, industrial & residential landlords and small commercial enterprises. 



SES provides simple, tailored legionella testing risk assessments for commercial, industrial & residential landlords and small commercial enterprises. Based in Hampshire, London and the home counties as well as  serving clients throughout the UK, we offer a range of services carried out by our experienced and competent surveyors.

Since 2000, SES has been carrying out legionella risk assessments on a wide variety of different water systems. For larger water systems, we provide full legionella risk assessments compliant with BS8580.

However, with the growing demand for legionella testing for residential supplies, we have developed a new simple risk assessment as per ACoP L8 and HSG274 guidance. 

This assessment will determine whether a residential or small commercial water system is compliant with the requirements in paragraph 25 of ACoP L8, which describes low risk systems. The risk assessment is completed on-site by one of our trained, knowledgeable surveyors.

If issues are identified, then we can take water samples to determine if legionella is present, (as per BS7592 requirements). On an average, 1-5% of all domestic water systems in the UK have legionella present. 

A report is completed by hand on-site which can be left with you or posted. If treatment is required after the legionella testing, SES will offer recommendations on the best course of action to take.

Highly trained & experienced


CompEX (hazardous area) installation and maintenance using approved certified staff


Hold CSCS (Construction Skills Certificate for Safety) card accreditation


Are trained on utility site-specific passports


Hold 18th edition electrical certification to BS7671


We are confined space entry trained


Are IOSH and NEBOSH qualified


Are Approved Registered Persons (NPORS) to BS7121 for crane lifting exercises


Hold EUSR national water hygiene cards

Years Established

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CompEx Certified

The CompEx Scheme is the recognised global scheme for the protection of workers anywhere that explosive atmospheres exist. The CompEx Scheme provides competency validation of individuals across a range of disciplines and different hazards to help create a safer workplace.

EUSR national water hygiene card holders

The National Water Hygiene (‘Blue Card’) scheme plays a vital part in ensuring the protection of public health and promoting safe drinking water practices. Originally developed in 2006, this scheme replaced the many different water company specific hygiene training programmes and courses, removing the need for individuals to undergo separate testing, health screening and the carrying of multiple cards.

Construction Skills Certification Scheme

CSCS cards provide proof that individuals working on construction sites have the appropriate training and qualifications for the job they do on site. By ensuring the workforce are appropriately qualified the card plays its part in improving standards and safety on UK construction sites.

The Ultimate Service

Our integrated approach and all-encompassing service make us who we are. We are extremely proud of our edge in bringing technical expertise, engineering excellence, project management experience and wealth of knowledge to every project.

Founded on the ethos of Lifecycle Engineering, SES provides complete support and engineering expertise throughout the lifecycle of the project.

From concept to feasibility right through to design, build, installation, operation, maintenance and support, SES oversees every stage of the project.

Call For a Quote:

0800 689 0631

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Contact details

SES Ltd, Southern Water, Millbrook STC, Western Docks, Western Avenue, Southampton, SO15 0HH