Water Tank Chlorination

New mains chlorination is important in order to maintain quality of the mains drinking water supply. 

SES Environmental Services LTD provide chlorination services, certificate and UKAS accredited water sampling/analysis on a nationwide basis to newly installed MDPE HPPE mains pipe work. We use the latest equipment and technology in accordance with BSI PD855486:2015 BS6700 BS8558 (Formally BS6700) * BSEN805.​

New mains chlorination is important in order to maintain quality of the mains drinking water supply. Water Utility companies will not allow the connection of new mains piping onto their system until the new pipe work has been chlorinated effectively and a detailed, comprehensive chlorination certificate alongside a microbiological analysis has been provided.

Our bespoke equipment is purposely built by ourselves to prevent any chance of contaminating existing supplies during the chlorination and all our operatives hold the National Water Hygiene Card allowing them to work on new mains supplies, they also all hold a CSCS card allowing work on construction sites.  

We do not use subcontractors and our get it right first-time attitude ensures that customers obtain a quick and hassle free connection.  In the unlikely event of issues we will happily liaise directly with the Water Authority on your behalf.​

SES Environmental Services is a nationwide company with over 10 engineers located throughout the UK. Our engineers are trained to the highest levels and hold the current national water hygiene EUSR and CSCS cards. We will always use the latest dosing equipment to ensure the job is carried out to the highest of standards. 

We provide the client with detailed Risk and Method statements (RAMS) prior to any work starting.

Once the chlorination is completed, we can provide extensive water testing services through a UKAS certified laboratory to ensure confidence in the cleanliness of your water system.​


What do we test for?


E-coli, Total Coliforms , TVC, Chloride, Clarity, Turbidity, Total and Free Chlorine, NLF, pH and more in-line with Water Authority requirements.

We provide a full electronic chlorination certificate on completion of the work and provide bacteria analysis and certification from a UKAS certified laboratory to ensure confidence in the cleanliness of water. Our chlorination certificates are recognized by Water Authorities across the country as some of the most comprehensive and detailed in the industry.

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