Legionella Risk Management Market Report 2026

The legionella risk management market size has grown strongly in recent years. It will grow from $1.5 billion in 2025 to $1.64 billion in 2026 at a compound annual growth rate (CAGR) of 9.6%. the growth in the historic period can be attributed to increasing regulatory compliance, growing water safety awareness, rising incidence of legionella outbreaks, expanding commercial infrastructure, increasing healthcare facility monitoring.

The legionella risk management market size is expected to see strong growth in the next few years. It will grow to $2.34 billion in 2030 at a compound annual growth rate (CAGR) of 9.3%. the growth in the forecast period can be attributed to growing demand for risk assessment services, increasing investment in water treatment technologies, rising adoption of digital monitoring systems, expanding building safety regulations, growing focus on preventive maintenance. Major trends in the forecast period include technology advancements, remote monitoring innovations, developments in smart water management, research and developments in detection methods, digital transformation in risk management.

The increasing concerns over waterborne diseases are expected to propel the growth of the Legionella risk management market going forward. Waterborne diseases refer to infections caused by pathogenic microorganisms transmitted through contaminated water, with Legionnaires’ disease being a severe form caused by Legionella bacteria. Concerns over waterborne diseases are increasing due to aging water infrastructure, which elevates the risk of bacterial contamination. Legionella risk management supports waterborne disease prevention by enabling proactive monitoring and control of bacterial contamination, making it essential for buildings with complex water systems. It enhances public safety by limiting Legionella growth, reducing outbreak risks, and strengthening overall water quality management. For example, in September 2025, according to the World Health Organization, a Switzerland-based intergovernmental organization, 60 countries reported more than 560,000 cases and over 6,000 deaths in 2024, representing a slight increase in reported cases and a notable rise in deaths compared with 2023. As a result, growing concerns over waterborne diseases are driving the growth of the Legionella risk management market.

Leading companies in the Legionella risk management market are focusing on developing advanced diagnostic solutions, such as highly automated, high-throughput assays, to improve detection speed, enhance diagnostic accuracy, and reduce the risk of misdiagnosis and associated mortality. Highly automated, high-throughput assays are advanced laboratory tests that enable rapid and precise identification of Legionella antigens to confirm a diagnosis of Legionnaires’ disease. For example, in July 2023, DiaSorin, an Italy-based diagnostics company, launched the LIAISON Legionella Urinary Antigen Assay across all CE-mark-accepting countries. This fully automated immunodiagnostic assay is designed to operate on the company’s LIAISON® CLIA analyzers and features an innovative dual-antigen design that simultaneously detects antigens from both Legionella pneumophila and Legionella longbeachae. This approach improves sensitivity and specificity, enabling clearer differentiation of Legionnaires’ disease from other lung infections. The assay delivers results in approximately 35 minutes, supporting timely antimicrobial treatment and improved case management to help reduce mortality associated with this serious form of pneumonia.

In November 2024, Ecolab Inc., a US-based global provider of water, hygiene, and energy technologies, acquired Barclay Water Management Inc. for an undisclosed amount. Through this acquisition, Ecolab aims to strengthen its Legionella risk management capabilities by integrating Barclay’s proprietary iChlor Monochloramine System and digital monitoring solutions with Ecolab’s circular water programs and ECOLAB3D platform. This integration is intended to deliver continuous water safety monitoring and improved operational performance for industrial and institutional customers. Barclay Water Management Inc. is a US-based provider of water safety and digital monitoring solutions specializing in Legionella control.

Major companies operating in the legionella risk management market are Thermo Fisher Scientific Inc., Ecolab Inc., SUEZ S.A., Eurofins Scientific SE, SGS S.A., ChemTreat Inc., Xylem Inc., Rentokil Initial plc, Bureau Veritas S.A., BWT Aktiengesellschaft, Intertek Group plc, bioMérieux S.A., IDEXX Laboratories Inc., Solenis LLC, Kurita Water Industries Ltd., ALS Limited, Chem-Aqua Inc., HydroChem Group Pty Ltd., Legionella Control International Ltd., ALVIM S.r.l.

North America was the largest region in the legionella risk management market in 2025. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in the legionella risk management market report are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the legionella risk management market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

Note that the outlook for this market is being affected by rapid changes in trade relations and tariffs globally. The report will be updated prior to delivery to reflect the latest status, including revised forecasts and quantified impact analysis. The report’s Recommendations and Conclusions sections will be updated to give strategies for entities dealing with the fast-moving international environment.

Tariffs have had a moderate impact on the legionella risk management market by increasing costs for imported testing kits, water treatment chemicals, and monitoring devices. The impact is more pronounced in product and equipment intensive segments and in regions reliant on cross border supply chains such as Europe and Asia-Pacific. Service focused offerings remain less affected, encouraging providers to emphasize consulting and digital monitoring solutions. In some cases, tariffs have supported local sourcing of treatment products and strengthened regional service ecosystems.

Legionella risk management refers to a set of specialized services designed to prevent, control, and monitor Legionella bacteria in water systems in order to reduce the risk of Legionnaires’ disease and ensure compliance with health and safety regulations. It typically includes Legionella risk assessments, water testing and monitoring, system maintenance, cleaning and disinfection, compliance documentation, digital monitoring solutions, and advisory or consultancy services. These activities help protect public health, support regulatory compliance, and maintain safe water systems across a wide range of sectors.

The primary components and offerings of legionella risk management include services, testing and diagnostics, products and chemicals, and software and monitoring solutions. Services include professional offerings that support the identification, control, and prevention of Legionella contamination through activities such as system inspections, water safety planning, compliance assessments, and ongoing maintenance of water management programs. Solution types include testing and sampling services, risk assessment and audit services, water treatment and disinfection systems, monitoring and control systems incorporating IoT, sensors, and software, and digital compliance and documentation platforms. Technologies used include PCR and molecular testing, UV disinfection systems, IoT-based monitoring technologies, automated chemical dosing systems, and AI-driven predictive analytics platforms. These solutions are applied across potable water systems, cooling towers and HVAC systems, hot water systems, decorative water features such as fountains, spas, and pools, and industrial process water systems, and are adopted by end-user industries including healthcare facilities, hospitality, commercial real estate, industrial facilities and manufacturing plants, educational institutions, and government and public buildings.

The Legionella risk management market includes revenues earned by entities through water safety risk assessments, sampling and laboratory testing, water treatment, digital monitoring (iot sensors, remote monitoring), compliance software services, consultation, training, and remediation services. The market value also includes the value of related goods (e.g., testing kits, water treatment chemicals, monitoring devices) sold by the service provider or included within the service offering. Only goods and services traded between entities or sold to end consumers are included.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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