Specialist Water Hygiene Support for Complex Industrial Environments
Industrial and manufacturing sites can have some of the most varied and complex water systems found within commercial premises.
Large buildings, changing occupancy, welfare facilities, showers, stored water, extensive distribution systems and areas of intermittent use can all influence Legionella risk.
Source Water Compliance provides independent Legionella risk assessments and water hygiene consultancy for industrial, manufacturing and engineering environments.
We help dutyholders, facilities teams and site managers understand their water systems, identify areas of concern and establish practical control measures.
Need a Legionella risk assessment for an industrial or manufacturing site?
Why Industrial Sites Need Specialist Attention
Industrial premises can vary enormously in size, use and complexity.
A single site may contain offices, production areas, warehouses, laboratories, workshops, welfare facilities and specialist plant — all supplied by different sections of the water system.
Typical systems and areas may include:
- Cold water storage tanks
- Calorifiers and central hot water systems
- Hot water return systems
- Showers and changing facilities
- Wash hand basins and welfare areas
- Staff kitchens and canteens
- Emergency showers and eyewash stations
- Low-use outlets
- External taps and hose connections
- Water softeners and treatment equipment
- Booster sets
- Expansion vessels
- Thermostatic mixing valves
- Redundant or legacy pipework
- Remote buildings or rarely occupied areas
- Process Systems
Where additional water systems or aerosol-generating equipment are present, these may require further consideration depending on their design and use.
Industrial Legionella risk assessments therefore need to look beyond individual outlets and consider how the entire water system operates across the site.

Industrial Legionella Risk Assessments
Our assessments involve a detailed inspection of the water systems together with a review of the measures already in place to manage Legionella risk.
Depending on the site, this may include:
Incoming Water Supplies
Identification of incoming mains supplies and how water is distributed throughout the site.
Cold Water Storage
Inspection of storage tanks, associated pipework, condition, configuration, turnover and temperatures.
Hot Water Systems
Assessment of calorifiers, water heaters, circulation systems and temperature control.
Showers and Welfare Facilities
Review of showers, changing rooms, washrooms and other aerosol-generating outlets used by employees and contractors.
Low-Use Areas
Identification of outlets or areas where water use may be intermittent, including spare offices, remote workshops, vacant units and seasonal facilities.
Water Temperatures
Temperature checks throughout the system to help establish whether suitable control is being achieved.
System Configuration
Identification of dead legs, redundant pipework, excessive pipe runs, poorly circulating sections and other conditions that may encourage stagnation.
Water Hygiene Management
Review of available records including flushing, temperature monitoring, tank inspections, cleaning and disinfection, sampling and maintenance documentation.
Complex Sites Require Practical Assessments
Industrial water systems often develop gradually over many years.
Buildings may be extended, production areas altered, departments relocated and outlets taken out of use.
As a result, older sites can contain redundant pipework or areas of poor water turnover that are not immediately obvious.
A Legionella risk assessment should therefore consider not only the original system design, but how the site is actually being used today.
This is particularly important following:
- Refurbishment
- Changes in occupancy
- Production changes
- Building extensions
- Temporary closures
- Decommissioning of areas
- Installation of new welfare facilities
- Removal or relocation of water-using equipment
Practical Recommendations — Not Just a Report
Our reports are designed to provide clear, prioritised actions that site teams can work with.
Recommendations may include:
- Improving hot or cold water temperature control
- Introducing or reviewing flushing regimes
- Removing redundant pipework
- Improving hot water circulation
- Cleaning or maintaining cold water storage tanks
- Reviewing low-use showers and welfare facilities
- Servicing thermostatic mixing valves
- Investigating poorly performing outlets
- Improving monitoring records
- Updating the Written Scheme of Control
- Undertaking sampling where appropriate
- Reviewing responsibilities between site teams, landlords and contractors
The objective is to provide proportionate and practical recommendations based on the actual risk present.
Supporting Operational Sites
Industrial facilities cannot always simply shut down systems or take areas out of service.
Water hygiene controls therefore need to work alongside normal site operations.
Our approach considers:
- Shift patterns
- Site occupancy
- Contractor use
- Weekend shutdowns
- Seasonal operations
- Remote buildings
- Production constraints
- Access restrictions
- Planned maintenance periods
This helps ensure that recommendations are realistic and can be incorporated into existing facilities and maintenance programmes.
Independent Water Hygiene Consultancy
Source Water Compliance provides independent water hygiene consultancy focused on identifying risk and helping dutyholders manage it effectively.
We do not approach the assessment as a way of generating unnecessary remedial work.
The aim is to give facilities teams a clear understanding of:
what the risk is, why it matters, what needs to be done and what should be prioritised.
Supporting Services for Industrial Sites
Legionella Risk Assessments
Detailed assessment of domestic and relevant water systems across industrial and manufacturing facilities.
Written Schemes of Control
Development or review of site-specific Written Schemes describing how Legionella risks should be controlled and monitored.
Water Hygiene Audits
Independent reviews of existing water hygiene programmes, records and contractor performance.
Water System Schematic Drawings
Clear schematic drawings showing the principal components and distribution of the water system.
Water Hygiene Consultancy
Support following system changes, unusual findings, sampling results, refurbishment works or water hygiene incidents.
Sites We Can Support
We can provide water hygiene support for:
- Manufacturing plants
- Factories
- Engineering facilities
- Warehouses and distribution centres
- Industrial estates
- Research and laboratory facilities
- Processing facilities
- Workshops
- Production sites
- Logistics facilities
- Multi-building industrial campuses
- Facilities management companies responsible for industrial estates
For multi-site organisations, assessments can be carried out using a consistent approach across the portfolio to make findings and actions easier to manage.
Arrange an Industrial Legionella Risk Assessment
If you manage an industrial or manufacturing facility and require a Legionella risk assessment, review of your existing water hygiene arrangements or independent advice regarding a particular system, speak to Source Water Compliance.
We can discuss your site, the water systems present and the most appropriate approach.

