Water treatment companies ensure safe and clean water for homes and businesses. In the UK, many companies deliver top-notch solutions. This list highlights the top 10 water treatment companies in the country. Each company has a reputation for quality and reliability. Read on to learn about the best options available.
10 Best Water Treatment Companies in the United Kingdom
1. Comfort Services Group
Comfort Services Group are your go-to water treatment and hygiene consultancy in the UK. We offer bespoke services to clean, sterilise, chlorinate, flush, treat then commission or re-commission your systems while minimising environmental impact.
Our team specialises in HVAC commissioning, BSRIA flushing and closed-circuit flushing, water treatment, domestic water hygiene compliance along with potable water and legionella control.
Safety is our priority, and we also provide chlorination, tank cleaning, risk assessments, and log books. Our teams also conduct environmental testing, thermal imagery and air quality sampling. We stand out with practical, cost-efficient solutions that balance performance and environmental care. For reliable water treatment specialists and consultants, trust Comfort Services Group.
Website: Comfort Service Group
2. WCS Group
WCS Group helps customers reduce water, chemical, and energy usage safely and reliably. They offer technical consulting, water and wastewater treatment, chemical supply, training, and air hygiene testing. Their solutions are tailored to each plant configuration, and customer need to ensure compliance, safety, and operational efficiency. As part of the Marlowe group, they provide a comprehensive range of services and software to help companies stay safe, efficient, and compliant.
Website: WCS Group
3. uRisk
uRisk Safety Services are experts in safety services and water hygiene with over 25 years of experience. Their engineers throughout the UK provide local support and excellent customer service. They offer comprehensive risk assessments to ensure business safety and avoid fines. uRisk provides on-site visits, 24/7 advice, and detailed risk management reports. They conduct Health and Safety Risk Assessments, Fire Risk Assessments, Asbestos Surveys, and PAT Testing. As water hygiene specialists, they handle water chlorination, quality monitoring, L8 Risk Assessment, Legionella Testing, Water Tank Cleaning, and Remedial Works.
Website: uRisk
4. Water Treatment Services
Water Treatment Services is an independent UK-based industrial water treatment company and environmental services specialist. They provide expert advice, engineering support, and consulting services for water, wastewater, air, and energy management. Their innovative solutions include industrial water treatment, legionella control, wastewater treatment, air quality analysis, and energy efficiency. They have UK offices in London, Manchester, Glasgow, Birmingham, Bristol, and Leeds. Their regional teams of engineers and specialists deliver support to clients in institutional, commercial, and industrial sectors throughout the UK and Ireland.
Website: Water Treatment Services
5. Feedwater
Feedwater manufactures and supplies water treatment chemicals, equipment, and water softeners. They provide specialist consultancy services to ensure commercial customers’ safety and keep industrial plants running. Based in the UK, they focus on commercial applications. They are experts in treating boilers and cooling water systems, Legionella control, chlorine dioxide products, and effluent and wastewater treatment.
Website: Feedwater
6. Guardian-Group
Guardian Hygiene Services Ltd, founded in 2004, is based in Lincoln and has grown to serve the entire UK. They have a skilled team of Water Hygiene Technicians, Legionella Risk Assessors, and Administration Support. Their services include water monitoring, Legionella risk assessments, water sampling, tank cleaning, thermometer valve servicing, tank replacements, and break tank installations.
Accredited by the Legionella Control Association, they also hold CHAS, Constructionline, Safecontractor, and BSI memberships. Guardian’s technicians are based across the UK, ensuring prompt and high-quality customer service.
Website: Guardian-Group
7. LegionellaControl
Legionella Control International is an expert supplier in Legionella risk assessment, training, and water testing. They provide independent and impartial water safety advice. Their services include managing and preventing Legionnaires’ disease, Legionella bacteria, Pseudomonas, and other waterborne pathogens. They use their hazard analysis and risk management experience to help clients improve safety processes and reduce risks. Their goal is to create a safer working environment for all.
Website: LegionellaControl
8. WaterHygieneCentre
The Water Hygiene Centre offers expert, independent water hygiene consultancy services. Their consultants’ extensive knowledge and experience ensure proactive management and support for water safety. They provide a comprehensive range of risk management services.
They support clients through long-term partnerships, offering continuity and expert risk management solutions. Their services include controlling Legionella, Pseudomonas aeruginosa, and scald risk. They focus on helping clients comply with water safety legislation and guidance, including ACoP [L8], HSG 274, and [S]HTM 04-01.
Website: WaterHygieneCentre
9. Aquatrust
Aquatrust helps maintain safety and compliance by managing water quality. They are experts in water hygiene and safety, including water treatment, regulations, and Legionella control. Their team includes qualified plumbing engineers, technicians, and risk assessors. They never outsource and ensure accountability and professionalism.
They provide Legionella Risk Assessments and a full range of water and air safety services. Aquatrust is ISO 9001 certified, a Category 1 Legionella Control Association member, and a Water Management Society member with City & Guilds trained engineers.
Website: Aquatrust
10. Swiftclean
Swiftclean is a leading UK provider of duct cleaning and Legionella risk services. They offer comprehensive compliance solutions for air and water hygiene and kitchen extract fire safety. AXA, one of the world’s largest insurance companies, recommends them for kitchen extract fire safety cleaning.
They work with building managers and FM companies, delivering expert advice and legally compliant services. Their services include Legionella control, kitchen extract cleaning, duct cleaning, water tank cleaning, grease trap management, indoor air quality monitoring, and fire damper testing across business sectors.
Website: Swiftclean
Why Choose Comfort Services Group?
Comfort Services Group offers a wide range of services to meet your needs. We specialise in closed system water treatment, flushing of new and remedial works to BSRIA standards on existing low temperature hot water & chilled water systems. Water hygiene and legionella control compliance to AcoP L8 & HSG 274, legionella risk assessments and water hygiene log books. Full Commissioning, re-commissioning and validation services to CIBSE code standards. Ductwork sampling and cleaning and are members of
- BSRIA (Building Services Research and Information Association)
- CSA (Commissioning Specialist Association)
- LCA (Legionella Control Association)
- Constructionline
- Alcumus SafeContractor
- Apprenticeship Scheme
- Armed Forces Covenant – Employer Recognition Scheme
- BSI ISO approved standards 9001 Quality Management Systems &14001 Enviromental Management Systems
Our team provides expert advice and practical solutions. We ensure high standards and reliable results for all projects. Trust Comfort Services Group for exceptional service.
FAQs
What factors should I consider when choosing a water treatment company?
Before choosing a filtration system for your well water, consider these factors:
- Contaminants: Test your water to identify impurities. Pick a filter that removes these contaminants.
- Compatibility: Ensure the system works with your plumbing. Seek professional advice if uncertain.
- Filtration Rate: Match the system’s rate to your household’s water usage.
- Costs: Factor in installation and ongoing maintenance expenses.
- Maintenance: Check how often you need to change filters and the system’s upkeep requirements.
How much does water treatment cost in the UK?
Water treatment costs can dramatically vary depending on the requirement of the project, the systems, the building, client needs and timescales . Prices will also depend on key factors, including the water treatment technologies used: CPC Closed-loop pre-treatment cleaning for example and the scope of the products and services utilised.
Who is the best water treatment company in the UK?
Comfort Services Group stands out in the UK for their expertise in water treatment, hygiene, and compliance. Their team stays updated with the latest technology to provide reliable advice and solutions. Comfort Services Group ensures their drinking water supply services maintain high standards for all projects. Their services ensure safety and satisfaction. Trust Comfort Services Group for the best results.
We are proud to share our experience and knowledge and take pride in offering this to all clients when required. If I, or one of the team can help then please schedule a meeting via the office or get in touch via one of our social media platforms.
- Top 10 Best Legionella Risk Assessment Companies in the UK (2026) - June 24, 2026
- Coagulation and Flocculation in Water Treatment: What’s the Difference? - April 7, 2026
- What is the Chain of Infection and How to Break It? - March 27, 2026
