Legionella Risk Assessment: Guide for UK Sports Centres and Recreational Grounds or HSG274 and ACoP L

Legionella Risk Assessment in Sports & Leisure Facilities: A Professional Guide

As water safety specialists working within the sports sector, we understand that these facilities present unique challenges for effective Legionella management. The combination of showering facilities, swimming pools, spa areas, and seasonal usage patterns creates a distinctive risk profile requiring specialised approaches. This guide explores the essential considerations for conducting Legionella risk assessments in sports facilities, focusing on building complexity and key risk factors.


Understanding Your Legal Position

As a facility owner, manager or operations director, you likely serve as either the duty holder or responsible person under the Health and Safety at Work Act 1974 and COSHH Regulations 2002. The HSE's Approved Code of Practice L8 and HSG274 provide the compliance framework, but effective implementation requires understanding your specific operational context.

Your key responsibilities include:

  • Ensuring comprehensive risk assessments by competent individuals
  • Implementing appropriate control measures
  • Maintaining ongoing monitoring processes
  • Keeping detailed records
  • Providing appropriate staff training across relevant departments


Proactive engagement with these responsibilities creates safer environments while effectively managing compliance obligations.


Building Complexity: A Critical Factor in Risk Assessment


The Challenge of Sports Facility Water Systems


The physical configuration of your facility's water systems shapes your Legionella risk profile and management requirements:

1. Multiple Water System Types

Most sports facilities feature diverse water systems:

  • Changing room shower facilities
  • Swimming pools and associated plant rooms
  • Spa pools, therapy pools and hot tubs
  • Drinking water fountains
  • Irrigation systems for outdoor playing surfaces
  • Decorative water features


This diversity creates a complex network requiring comprehensive mapping. Critical risk areas often emerge where different systems interface, requiring careful management to maintain appropriate control.


2. Mixed Building Stock and Age Profiles

Many sports facilities have evolved over time:

  • Original buildings with legacy plumbing systems
  • Extensions or additional facilities added during different periods
  • Converted spaces repurposed for changing sports requirements
  • Outdoor facilities with separate water systems


This development pattern often results in complex interconnections between different sections, creating potential dead legs and redundant pipework. We recently assessed a leisure centre that had expanded from an original swimming pool to include gym, sports hall and spa facilities over 25 years – creating a network of interconnected systems with multiple potential risk points.


3. Specialised Water Features

Sports facilities often incorporate specialised water systems:

  • Swimming pools with complex filtration systems
  • Spa pools operating at elevated temperatures
  • Hydrotherapy facilities for rehabilitation
  • Ice baths and contrast therapy systems
  • Outdoor irrigation networks


These specialised systems require specific expertise and management approaches that differ significantly from standard domestic water system control measures.


Operational Complexity


1. Dramatic Usage Fluctuations

Sports facilities typically experience significant variations in usage:

  • Seasonal sporting activities creating different demand patterns
  • Weekend tournament peaks followed by quieter weekdays
  • Holiday period fluctuations
  • Weather-dependent variations
  • Event-based usage creating short-term demand spikes



These fluctuations create challenges for maintaining consistent water movement. During periods of low usage, extensive sections of pipework may experience minimal flow, creating potential stagnation issues.


2. Extended Operational Hours

Many sports facilities operate from early morning to late evening, creating specific challenges:

  • Need for constant hot water availability
  • Limited access windows for maintenance
  • Multiple staff shifts with varying expertise levels
  • Complex cleaning and maintenance schedules
  • Continuous operation with minimal downtime


These operational requirements necessitate carefully designed control strategies that balance user experience with effective risk management.


Key Risk Factors in Sports Facilities


1. Shower Facilities

Changing room showers represent a primary risk area:

High-Volume, Intermittent Usage

Sports facility showers typically experience distinctive usage patterns:

  • Intense periods of use immediately after sporting activities
  • Periods of minimal usage between sessions
  • Weekend tournament peaks creating extreme demand
  • Potential for extended quiet periods during off-season


These patterns create unique challenges for temperature maintenance and stagnation prevention. High-demand periods can stress hot water systems, potentially creating conditions where temperatures fall into the hazardous range (20-45°C), while quiet periods can lead to stagnation.


Temperature Management Challenges


Maintaining appropriate temperatures presents significant challenges:

  • Multiple thermostatic mixing valves (TMVs) requiring regular maintenance
  • High demand creating potential for cold water temperature increases
  • User expectations for immediate hot water availability
  • Balance between scalding prevention and Legionella control


For facilities with numerous shower points, we recommend implementing a representative sampling approach for temperature monitoring, with sentinel points in each changing area, supplemented by rotating checks of additional outlets.


2. Swimming Pools and Spa Facilities

Aquatic areas present specific Legionella risks:

Swimming Pool Plant Rooms

Pool plant areas contain complex water treatment systems:

  • Filtration equipment requiring regular backwashing
  • Chemical dosing systems for disinfection
  • Heat exchangers for temperature maintenance
  • Backwash water systems and balance tanks


While properly maintained swimming pools present relatively low Legionella risk due to disinfection, associated systems like balance tanks and backwash systems can create risk points requiring careful management.


Spa Pools and Hot Tubs

Spa facilities represent one of the highest risk areas:

  • Operating temperatures ideal for Legionella growth
  • Significant aerosol generation during normal operation
  • Complex filtration and treatment requirements
  • High bather loads introducing organic material
  • Potential for biofilm development in circulation pipework


These facilities require rigorous management protocols aligned with HSG282, including comprehensive water treatment, regular microbiological testing, and enhanced monitoring.


3. Outdoor and Specialised Water Systems

Many sports facilities incorporate outdoor water systems:

Irrigation Systems


Pitch and grounds irrigation networks present specific considerations:

  • Seasonal operation, often unused during winter months
  • Operation at ambient temperatures favourable to bacterial growth
  • Extended pipework covering large areas
  • Multiple outlets with variable usage


These systems require specific seasonal commissioning and decommissioning protocols to manage risks associated with intermittent use.


Specialist Therapy Facilities

Performance sports facilities often feature specialised water-based therapy systems:

  • Hydrotherapy pools operating at elevated temperatures
  • Cold therapy and ice baths
  • Contrast therapy systems with both hot and cold elements
  • Rehabilitation pools with specialised equipment


These systems may operate under unique temperature regimes and usage patterns, requiring specific risk assessment and control strategies.


4. System Design Features

Dead Legs and Low-Flow Areas

Sections of pipework where water movement is limited create ideal conditions for Legionella colonisation:

  • Building modifications leaving unused pipe sections
  • Changing rooms reconfigured without proper system adaptation
  • Facilities expanded incrementally without comprehensive redesign
  • Original designs including long branches to specific outlets

Detailed system mapping is essential to identify these problem areas.


Temperature Control Challenges

Maintaining appropriate temperatures throughout extensive systems presents significant challenges:

  • Heat loss in long pipe runs serving distant changing facilities
  • Inadequate insulation causing cold water warming
  • Return loop balancing issues affecting circulation
  • Intermittent use affecting temperature stability

Comprehensive temperature profiling provides essential data for identifying problem areas.


Conducting Effective Risk Assessments

Pre-Assessment Preparation

Before physical inspection, gather comprehensive information:

  • Building schematics and water system diagrams
  • Previous assessment reports
  • Maintenance records and water quality testing results
  • Usage data showing seasonal and weekly patterns


Facilities with incomplete documentation often present higher risks due to knowledge gaps about system configuration.


Physical Inspection Elements

A thorough assessment should include:

Cold Water Systems

  • Storage tank condition and configuration
  • Temperature measurements at tanks and representative outlets
  • Assessment of insulation effectiveness
  • Identification of dead legs or poor flow areas


Hot Water Systems

  • Calorifier/water heater configuration
  • Temperature measurements at storage, distribution points, and outlets
  • Evaluation of return loop balancing
  • Assessment of TMV function and maintenance


Shower Facilities

  • Representative temperature measurements across changing areas
  • Physical condition of shower heads and hoses
  • TMV performance and maintenance status
  • Assessment of usage patterns and potential stagnation risks


Specialised Water Systems

  • Pool plant configuration and operation
  • Spa pool treatment and monitoring systems
  • Specialist therapy equipment management
  • Irrigation system design and operation


Operational Assessment

Evaluation of management practices should include:

  • Review of the written scheme of control
  • Assessment of monitoring record keeping
  • Evaluation of flushing regimes for infrequently used outlets
  • Review of staff training and awareness levels
  • Evaluation of communication between departments


Implementing Effective Management Systems

Written Scheme of Control

Develop facility-specific protocols addressing:

  • System description and key control points
  • Control measures tailored to operational patterns
  • Monitoring procedures reflecting usage variations
  • Record-keeping requirements
  • Response procedures for adverse results


Usage-Based Management Strategies


High-Usage Periods

During peak seasons or events, focus on:

  • Maintaining system balance despite high demand
  • Monitoring temperature stability under high-load conditions
  • Implementing enhanced cleaning of shower facilities


Low-Usage Periods

During quieter periods, priorities shift to:

  • Implementing flushing programmes for unused areas
  • Considering isolation of completely unused sections
  • Enhancing monitoring to verify control effectiveness


Seasonal Transition Management

The transition between seasons requires:

  • Structured recommissioning protocols for seasonal facilities
  • Enhanced monitoring during initial reactivation
  • System preparation for anticipated demand changes

Interdepartmental Collaboration

Effective management requires coordination across:

  • Cleaning staff implementing shower head maintenance
  • Facility booking teams providing usage forecasts
  • Maintenance personnel conducting regular monitoring
  • Pool operators managing specialist water systems
  • Grounds staff overseeing irrigation and outdoor systems

Develop clear responsibility matrices and communication protocols, with particular attention to handover periods between teams.


Staff Training Requirements

Implement tailored training programmes:

  • Management teams: understanding of legal responsibilities
  • Maintenance staff: technical training on monitoring and control measures
  • Cleaning personnel: awareness of shower maintenance
  • Pool operators: specialist training in water treatment
  • Seasonal staff: effective induction on basic awareness

This ensures all personnel understand their role in maintaining water safety.


Conclusion

Managing Legionella risks in sports facilities requires understanding both technical and operational factors. The complexity of these buildings, combined with their distinctive usage patterns, demands a tailored approach.


By focusing on the key risk factors outlined and implementing robust assessment and management processes, sports facility operators can effectively protect users' health while meeting legal obligations. Remember that Legionella control requires ongoing attention as facilities and their usage evolve.


We encourage you to view Legionella risk assessment not merely as compliance but as an integral component of providing safe facilities for your users, protecting both public health and your organisation's reputation.

By James Campbell March 11, 2026
As water safety specialists working alongside estates and facilities professionals in the education sector, we understand the unique challenges faced by higher education institutions when managing Legionella risks. University and college campuses typically comprise multiple buildings of varying ages, diverse water system designs, and fluctuating occupancy patterns—creating an environment where comprehensive water safety management is both essential and complex. This guide shares our expertise on implementing effective Legionella management in higher education settings, with particular focus on building complexity factors and practical risk assessment approaches that can streamline your compliance efforts. Understanding Your Legal Obligations in Higher Education Higher education institutions operate under strict legal obligations regarding Legionella control. As the responsible team, you must ensure compliance with: The Health and Safety at Work Act 1974 Control of Substances Hazardous to Health Regulations 2002 (COSHH) Management of Health and Safety at Work Regulations 1999 The Health and Safety Executive's Approved Code of Practice L8 (ACoP L8) HSG274 Parts 1-3 technical guidance Within universities and colleges, responsibility typically cascades through several key roles: Vice-Chancellor/Principal : Often holds ultimate responsibility as the duty holder Estates/Facilities Directors : Usually appointed as the "responsible person" for day-to-day water safety management Health and Safety Managers : Provide expertise and ensure regulatory compliance Building Managers : Oversee Legionella controls in specific campus buildings Specialist Contractors : External experts who may conduct assessments or implement control measures From our experience supporting higher education institutions, we've observed that those with clear responsibility structures and robust communication between these roles implement more effective water safety management programmes. Building Complexity Factors in Higher Education Estates The diverse nature of university and college estates creates unique challenges for Legionella management: 1. Diverse Building Portfolio Higher education estates typically include buildings from different eras with varying water system designs: Historic Buildings : Often feature legacy plumbing systems with potential dead legs and outdated materials Modern Campus Buildings : May include complex water systems with sophisticated controls Purpose-Built Facilities : Research laboratories, sports complexes, and performance venues with specialist water requirements Residential Accommodation : From traditional halls to modern en-suite apartments with different risk profiles This diversity requires tailored approaches to risk assessment and management rather than a one-size-fits-all strategy. 2. Specialised Facilities Universities and colleges maintain numerous facilities with unique water system requirements: Research Laboratories Specialised water systems including purified water supplies Cooling equipment with water circuits Emergency safety showers and eyewash stations Process water for experimental equipment Sports Facilities Swimming pools and hydrotherapy installations Multiple shower blocks with significant aerosol generation Spa facilities in some campus leisure centres Irrigation systems for outdoor playing fields Catering Operations Commercial kitchens with specialised equipment Multiple food service locations across campus High-capacity water heating and washing systems Specialised beverage dispensing systems Each of these specialised areas requires specific consideration within your Legionella management strategy. 3. Complex Distribution Networks The infrastructure connecting campus buildings creates additional complexity: Interconnected buildings supplied through ring mains Multiple plant rooms housing different water services Complex distribution networks with numerous sub-systems Building Management Systems (BMS) controlling various aspects of water systems In our assessment work, we've found that understanding these interconnections is crucial for effective risk management, particularly when implementing changes to one part of a system that may affect other areas. Key Risk Factors in Higher Education Settings 1. Occupancy Fluctuations Unlike most commercial buildings, higher education institutions experience dramatic occupancy variations: Term-time peaks with high, consistent water usage Vacation periods with significantly reduced occupancy Conference and event hosting creating unusual usage patterns Research facilities operating year-round alongside seasonal areas These fluctuations create significant challenges for maintaining water turnover and appropriate temperatures. Our assessments typically identify transition periods between academic terms as particularly high-risk, requiring specific management protocols. 2. Student Accommodation Residential facilities present particular challenges related to occupancy variability: En-suite proliferation creating numerous potential dead legs when unoccupied Varied usage patterns depending on student behaviour International student arrivals outside normal term patterns Vacation repurposing for conference delegates and summer schools For effective management, we typically recommend: Comprehensive flushing programmes during vacation periods Strategic isolation of unoccupied accommodation blocks Enhanced monitoring of sentinel points in residential areas Clear guidance for students on reporting water system concerns 3. Legacy Infrastructure Many higher education institutions maintain older buildings with infrastructure challenges: Ageing pipework with increased corrosion and biofilm development risks Poorly documented systems from multiple renovation phases Inadequate access for maintenance in historic buildings Mixed materials creating potential system incompatibilities These physical constraints often require both creative engineering solutions and enhanced monitoring regimes to manage effectively. 4. Specialist Research Areas Research facilities present unique challenges for Legionella management: Ultra-pure water systems with specialised treatment requirements Emergency safety equipment requiring availability despite infrequent use Cooling systems for research equipment operating at ideal Legionella growth temperatures Specialist water features for specific research applications We recommend creating dedicated risk assessment protocols for these areas, involving both estates teams and academic departments to ensure all specialist equipment is properly managed. Practical Risk Assessment Methodology Pre-Assessment Information Gathering Before conducting physical inspections, comprehensive information gathering provides vital context: Building asset registers documenting all water systems Schematic diagrams showing water distribution layouts Operational information including occupancy patterns and usage levels Maintenance records and previous assessment reports Building development history detailing system modifications This preliminary phase helps identify potential areas of concern and enables a more targeted physical inspection. Risk Assessment Team Assembly A successful Legionella risk assessment requires appropriate expertise: Water Hygiene Specialist : With recognised qualifications in Legionella risk assessment Estates Representative : Providing essential knowledge of campus infrastructure Building Services Engineer : Offering expertise on mechanical systems Health and Safety Professional : Ensuring assessment meets regulatory requirements For complex campuses, we recommend a team-based approach rather than relying on a single assessor to ensure all aspects of the built environment are properly evaluated. Physical Inspection Elements A thorough assessment should include detailed inspection of all water system components: Cold Water Systems Storage tank condition and configuration Temperature measurements at tanks and representative outlets Evaluation of usage patterns across term and vacation periods Assessment of insulation effectiveness Identification of dead legs or areas of poor flow Hot Water Systems Calorifier/water heater configuration and condition Temperature measurements at storage, distribution points, and outlets Evaluation of return loop balancing where applicable Assessment of TMV function and maintenance Identification of scalding risks and control measures Specialist Systems Laboratory water systems including emergency safety equipment Recreational facilities including pools and shower areas Cooling towers and air conditioning systems Irrigation and water features Scheduling Considerations Timing is critical when planning Legionella risk assessments in higher education environments: Term-time assessments to evaluate systems under normal load conditions Vacation period reviews to assess management of low-use conditions Pre-return checks before students return after extended breaks Coordination with campus development projects to evaluate new or modified systems We typically recommend a programme of scheduled assessments throughout the academic year to capture different operational conditions. Implementing Effective Management Systems Engineering Controls and System Modifications Physical interventions to reduce Legionella risk include: Temperature management enhancements such as improved calorifier capacity Distribution improvements including dead leg removal and insulation upgrades Monitoring system installations for continuous temperature logging Automatic flushing systems for infrequently used outlets These engineering solutions should be designed by qualified professionals and implemented with careful consideration of wider system impacts. Operational Controls and Management Systems Procedural controls are equally important in managing Legionella risk: Enhanced monitoring programmes with comprehensive coverage of sentinel points Building-specific temperature monitoring schedules based on risk profiles Flushing programmes tailored to occupancy patterns Holiday period protocols for system management during low occupancy These operational controls should be fully documented in your written scheme of control and regularly reviewed for effectiveness. Documentation and Record Keeping Consistent documentation provides both compliance evidence and management insights: Risk assessment reports and review schedules Temperature monitoring records across different campus zones Maintenance activities including cleaning and disinfection Contractor work records and system modifications Training records for estates and facilities staff Electronic record systems can significantly streamline this process while improving accessibility and creating automatic compliance alerts. Practical Recommendations for Common Campus Scenarios Based on our experience supporting higher education institutions, here are effective approaches for common scenarios: Multi-Campus Universities For institutions operating across multiple sites: Site-specific management plans reflecting local building characteristics Consistent documentation standards across all campuses Central oversight with local implementation teams Coordinated monitoring programmes with clear responsibility allocation Research-Intensive Institutions Universities with significant research facilities benefit from: Collaborative approach between estates and academic departments Specialised risk assessment protocols for research equipment Clear responsibility boundaries for specialist equipment Integrated emergency response procedures for system failures Historic Campus Buildings Institutions with period properties require: Enhanced monitoring for buildings with legacy plumbing systems Creative engineering solutions for access-restricted areas Phased improvement programmes addressing highest-risk elements first Comprehensive system mapping to identify historical modifications Conclusion: Building a Water Safety Culture in Higher Education Managing Legionella risks across diverse higher education estates requires a comprehensive approach that balances technical expertise with practical operational considerations. Success depends on: Leadership commitment from senior management teams Integrated management between estates, accommodation, and academic departments Continuous improvement through regular system review and enhancement Clear communication between all stakeholders As specialists in higher education water safety, we encourage institutions to view Legionella management not merely as a compliance exercise but as an essential component of your wider campus safety culture. With appropriate, proportionate approaches tailored to your specific estate, you can maintain excellent water safety standards while managing resources effectively.  By focusing on the building complexity factors and key risk areas outlined in this guide, you can develop management strategies that effectively address your specific circumstances, ensuring both compliance and safety across your entire campus community.
By James Campbell March 11, 2026
Conducting Legionella Risk Assessments in Hotels