Specialist water treatment, water engineering and Legionella control services

Every day, we help manufacturers, commercial businesses, public organisations, institutions, FMs and maintenance companies look for better ways to perform strategic, non-core processes managing water, hygiene and compliance.

WCS Group is the UK No.1 tech-enabled water treatment specialist helping customers more effectively manage water systems (heating, cooling), blending, supplying and managing chemicals, cleaning and maintaining critical plant and equipment. We ensure clean, safe water, fresh air and exacting hygiene. We extend service life. We enhance operational efficiency. We help customers manage Legionella risk, conserve energy, reduce water use and maximise safety responsibly and predictably with measurable results

Water treatment used to be a ‘dark art’ specifying and administering chemicals to control scale, corrosion and bacteria. It still can be, but today, it is so much more too.

WCS Group provides the following services;

  • Design, Build, Monitor, Maintain
  • Audit, Test, Monitor, Service, Maintain
  • Chemical Management Services
  • Operational Improvement Engineering
  • Training and ACOP L8 Compliance
  • Water engineering, water purification
  • Water re-use and environmental impact
  • Risk Assessments
  • Remote Monitoring
  • Closed System Monitoring and Improvement

WCS Group is a Marlowe Critical Services company – the water treatment and hygiene division of Marlowe Critical Services comprising Water Treatment & Hygiene, Fire & Security and Air Quality divisions. You can access what you need when you want it via one common ‘highest standards’ service delivery platform.

Read more about water and Group capability

National coverage, local serviceRegionsMap_RGB

Our Risk Management:

Most customers are looking to manage risk, safety, financial cost, operational downtime and improve running efficiency while maintaining uncompromising compliance. They turn to us for;

  • Reliability – they want predictable improvements to operations, production and hygiene
  • Compliance – uncompromising, exacting and full HSE compliance (to law, best practice and in spirit)
  • Cost effectiveness – processes must be justified, advanced, tech-enabled if possible to deliver system improvements and enhanced economics and environmental impact

Water Treatment 60-second overview

  • What control improvement looks like
  • Who we work for
  • What you can expect


Water Treatment 60-second overview

Areas of Expertise:

Water Treatment – in Heat Transfer Applications >

  • Plant
    • Raw water treatment
    • Filtration
    • Water softening
    • Reverse Osmosis
    • Water recovery / recycling / reuse
    • Ion exchange / demineralisation
    • Specialised water treatment
    • Microfiltration
    • Ultrafiltration
    • Nanofiltration
  • Dosage
    • Dosing Pumps
    • Brominators, Tanks, bunds etc.
    • Water Meters, solenoid valves
    • o Controllers (including WebMaster)
      • Conductivity
      • pH/ORP
      • Boiler
      • Disinfection
    • Probes
  • Service
    • Site Survey
    • Risk Assessment
    • Testing and analysis
    • Legionella Analysis (including Rapid Assay)
    • Corrosion monitoring
    • LSI and scale monitoring
    • Biocide Sensitivity Testing
    • Cooling Tower cleaning and descaling
  • Chemicals
    • Liquid and Solid chemistry
    • Corrosion Inhibitors
    • Scale Inhibitors
    • Polymers
    • Biocides

Water Treatment – in Other Applications >

  • Thermal / evaporative system management
  • Effluent treatment
    • Solids handling / dewatering
    • Aerobic biological treatment
  • Pool Treatment

Water Hygiene >

  • Legionella Risk Assessment and Water Hygiene Surveys
  • Monitoring, Inspection and Log Book management
  • Remote temperature monitoring
  • Sampling and analysis
  • Cleaning and disinfection works

Air Hygiene >

  • Risk Assessment and Site Surveys
  • Indoor Air Quality Monitoring
    • Comfort factors (Temperature, Humidity, Airflow
    • Airborne Particle counts
    • Airborne Bacteria and Fungi
    • Gases (Carbon dioxide and others as appropriate)
  • Cleaning and Treatment of Air Handling plant / equipment
  • Kitchen Extract cleaning

Engineering >

  • Design and specification for water system management
  • Installation
  • Refurbishment and extension of service life
  • System improvement

Training >

  • eLearning
  • Legionella Control training
  • WCS group / IOSH / COSHH training
  • On-site training tailored to your site(s)