Legionella Testing Market Size & Outlook, 2025-2033

Legionella Testing Market Size

The global legionella testing market size was valued at USD 354.25 million in 2024 and is expected to grow from USD 384.72 million in 2025 to reach USD 744.36 million in 2033, growing at a CAGR of 8.6% during the forecast period (2025–2033).

The growth in the market is driven by the increasing importance of water safety across various industries due to heightened regulatory demands and rising awareness of waterborne diseases.

Legionella bacteria, which are accountable for Legionnaires' disease and Pontiac fever, are identified through Legionella testing. It typically involves culturing samples from the environment or patients, using rapid urinary antigen assays for fast results, and using PCR for accurate detection. This testing is indispensable for the prevention of disease outbreaks, the diagnosis of infections, and the management of water systems.

Market Trends

Advancements in Molecular Testing

The shift from traditional plate culture methods, the "gold standard" for over 30 years, to modern, rapid molecular testing techniques such as PCR and liquid culture methods is a crucial market trend for Legionella testing. Despite their established use, traditional approaches have limitations such as long incubation times (up to 14 days), lack of sensitivity, and high variability in results due to technician-dependent processes. In contrast, newer testing protocols offer significantly faster and more accurate results.

• For Instance, in November 2022, LuminUltra launched the GeneCount qPCR Corrosion Collection, a suite of DNA-based monitoring tools designed to address microbiologically influenced corrosion (MIC).

Growth of Water Treatment and Management Services

As industries and facilities increasingly prioritize water quality management, Legionella testing is integral to comprehensive water treatment and safety programs. This trend is particularly pronounced in healthcare, hospitality, and industrial processing sectors, where water systems are complex, and the risks associated with Legionella contamination are high. Regular testing for Legionella bacteria is essential in these environments to ensure compliance with health and safety regulations, protect vulnerable populations, and prevent costly outbreaks. Integrating advanced testing methods into broader water management strategies enhances water systems' overall safety, reliability, and efficiency, driving Legionella testing market growth.

• For Instance, in May 2022, ChemREADY, a water and wastewater treatment chemical manufacturer, launched a new Legionella testing service and product line to combat the bacteria in building water systems.

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Legionella Testing Market Growth Factors

Rapid Increase of Legionella-Related Illnesses

The global rise in Legionnaires' disease, driven by factors like aging infrastructure, climate change, and urbanization, underscores the urgent need for effective Legionella testing and management. This severe pneumonia, caused by Legionella bacteria, is increasing due to conditions favorable for bacterial growth. High-profile outbreaks and escalating case numbers have heightened awareness among the public and healthcare sectors. Consequently, there is a growing demand for frequent and accurate testing to prevent outbreaks, manage health risks, and meet regulatory standards. Healthcare facilities, building managers, and regulatory bodies are investing in advanced testing technologies and comprehensive water management systems.

• For Instance, the European Centre for Disease Prevention and Control (ECDC) reported a 26.3% increase in Legionnaires' disease cases in the EU/EEA from 2020 to 2021, highlighting the urgent need for better monitoring and preventive strategies.

Regulatory Water Testing Standards Accelerate Growth

Legal requirements for water testing significantly boost the market by mandating regular monitoring and control of Legionella bacteria in water systems. Governments and health agencies enforce strict regulations across industries such as healthcare, hospitality, and public facilities to ensure water safety. Compliance with these regulations necessitates routine Legionella testing to prevent outbreaks of Legionnaires' disease. Organizations face substantial penalties, legal liabilities, and reputational damage if they fail to meet these standards, driving them to invest in reliable Legionella testing solutions. This ongoing need for regulatory compliance consistently fuels demand for testing services and products, playing a crucial role in the growth of the market.

• For Instances: In October 2021, the EPA set legal limits on over 90 drinking water contaminants, increasing the demand for advanced Legionella testing technologies as organizations strive to meet these compliance requirements.

Restraining Factors

Aging Water Infrastructure

The condition of water supply networks plays a crucial role in the risk of Legionella outbreaks. Aging infrastructure, including deteriorating pipes and plumbing systems, can create environments that promote Legionella growth. As pipes degrade, they may develop biofilms that provide a protective habitat for Legionella bacteria. Furthermore, leaks and breaks in the water supply network can introduce contaminants and degrade water quality, heightening the risk of Legionella colonization.

The risk is even more significant in urban areas with older water supply networks. The complex network of pipes, some of which have been in place for decades, can harbor Legionella in difficult-to-access areas. Slow water flow in aging pipes can lead to stagnation, facilitating bacterial multiplication and increasing the potential for water supply contamination.

• For instance, in Flint, Michigan, switching to a corrosive water source during the Flint water crisis and aging infrastructure led to contamination and biofilm formation, significantly increasing the risk of Legionella outbreaks.

Low Sensitivity in Diagnostic Tests

Issues with the sensitivity of diagnostic tests are a vital restraint in the Legionella testing market. Low sensitivity can lead to false negatives, where the bacteria are present but undetected, particularly in environments with low bacterial concentrations. Environmental factors like water chemistry and the presence of other microorganisms can further reduce test accuracy. This can result in missed early-stage contamination, hindering effective prevention and control efforts. Consequently, testing reliability is compromised, posing safety risks and potential regulatory challenges for facilities relying on these tests to maintain water quality.

• For Instance, a Belgian multicenter study highlighted the limitations of relying solely on urinary antigen testing (UAT) for diagnosing legionellosis. The study found that 44.4% of UAT results were false negatives, missing a significant number of cases later confirmed through PCR testing. Such studies underline the risk of missed or delayed diagnoses when using low-sensitivity diagnostic tests.

Market Opportunity

Smart Building Technology for Real-Time Legionella Monitoring

Integrating Legionella testing with smart building management systems presents a substantial opportunity to improve water safety management. This integration enables the immediate detection and response to contamination by allowing real-time water quality monitoring. The risk of Legionella infestations can be mitigated by automated systems that initiate water treatment processes or notify maintenance personnel. In addition to enhancing contamination control, this synergy between advanced testing technologies and smart systems also offers a proactive approach to water safety maintenance. This advancement is especially advantageous in high-risk environments, such as hospitals, hotels, and large commercial structures, where water quality is essential for public health. The potential to integrate Legionella testing is increasing as smart building technologies continue to develop, which offers the potential for improved safety and more efficient building management.

Regional Insights

North America maintains its position as the leading Legionella testing market, driven by the rising incidence of Legionella infections, advancements in the healthcare system, and the presence of leading companies with the highest market revenue. As per the U.S. Environmental Protection Agency, 8,000–18,000 people are hospitalized annually with Legionnaires’ disease in the U.S., emphasizing the need for effective testing and management. Notable events in 2022, such as the investigation of Legionnaires’ disease cases by the South Carolina Department of Health and the detection Legionella bacteria in water samples across New Jersey, further underscored the urgency for robust testing protocols.

Key trends shaping the North American Legionella testing market include:

• Increasing incidence of Legionnaires’ disease leading to higher demand for testing.
• Significant state and regional investigations of Legionella outbreaks.
• Strategic acquisitions by market players enhance testing and remediation capabilities.
• Growth in collaborations focusing on advanced diagnostic technologies, particularly in Canada.

Europe Legionella Testing Market Trends

The European region is witnessing rapid growth in the market, driven by the rising approvals and accreditation of testing kits and government-led awareness programs. These initiatives significantly increase the region's demand for Legionella-related products and services. A key example is SPIE UK's receipt of ISO/IEC 17020 accreditation from the United Kingdom Accreditation Service (UKAS) in November 2022 for its Legionella risk management practices. This accreditation highlights the region's commitment to high standards and regulatory compliance, further accelerating European market growth.

Key opportunities in this market include:

• Increased government focus on public health and safety through awareness campaigns and prevention initiatives 
• Renovations in older buildings drive demand for Legionella testing to meet updated water safety standards.
• Leveraging EU partnerships to enhance testing capabilities and expand European market reach.

Test Type Insights

The market is bifurcated into culture methods, urinary antigen tests, direct fluorescent antibody tests, PCR, and others. PCR Segment Dominated Due to its Rapid, Accurate, and Sensitive Detection of Legionella Bacteria. In 2023, the PCR (Polymerase Chain Reaction) segment dominated the market due to its rapid, accurate, and sensitive detection capabilities. Unlike traditional culture methods, which take up to 14 days, PCR delivers results within hours, enabling quicker intervention to prevent Legionnaires' disease. PCR's ability to detect live and dead bacteria makes it a comprehensive tool for monitoring Legionella in high-risk environments like hospitals and water treatment facilities. Leading companies, including QIAGEN and Thermo Fisher Scientific, are driving this growth by developing advanced PCR solutions for Legionella detection.

• For instance, In August 2022, Genomadix Inc. partnered with Mayo Clinic to enhance its CubeTM point-of-care PCR diagnostic system, which provides Legionella test results in about one hour.

Application Type Insights

The market is divided into water testing, IVD testing, and others. Water Testing Lead with Faster Data Center Construction and Efficient Customer Service. In 2023, water testing led the market, driven by the widespread need to regularly monitor water systems across various industries, including healthcare, hospitality, and industrial sectors, to prevent Legionella contamination and outbreaks. Water testing is essential for ensuring potable water safety, cooling towers, and other water systems where Legionella bacteria can proliferate.

In the coming years, the IVD Testing (In Vitro Diagnostics) segment is expected to grow at the highest CAGR during the forecast period. This rapid growth is attributed to the increasing demand for quick, accurate, and non-invasive testing methods for Legionella in clinical settings. Adopting advanced diagnostic technologies, such as PCR and urinary antigen tests, which offer faster and more reliable results, is driving the expansion of the IVD Testing segment.

• For instance, In November 2021, Thermo Fisher Scientific launched the Applied Biosystems TaqPath Legionella Detection Assay, a susceptible PCR test that provides quick and precise Legionella detection, highlighting the rising importance of advanced IVD testing in clinical settings.

End User Insights

The market is categorized into hospitals, diagnostic laboratories, water treatment industries, and others. The Hospital Sector’s Leading Position is Fueled by Increasing Focus on Patient Safety, Regulatory Compliance, and Need for Rigorous Legionella Testing. The hospital segment led the market in 2023. Hospitals house vulnerable populations, including patients with compromised immune systems, who are at a higher risk of contracting Legionnaires' disease. This necessitates rigorous and frequent Legionella testing to ensure safe and contamination-free water systems. Additionally, healthcare facilities are subject to strict regulatory requirements that mandate regular testing and monitoring of water systems to prevent outbreaks. The combination of factors such as high-risk patient populations, regulatory pressures, and the need for constant vigilance in water quality has positioned hospitals as the leading segment in the market in 2023.

The diagnostic laboratories segment is projected to grow at the highest CAGR during the forecast period, driven by the increasing demand for specialized Legionella testing, the adoption of advanced diagnostic technologies, and the trend of outsourcing testing, spurred by stricter regulatory and public health standards.

• For instance, In December 2021, Pace Analytical Services acquired Special Pathogens Laboratory, enhancing its Legionella testing capabilities and solidifying its market position.

List of key players in Legionella Testing Market

1. Merck KGaA
2. Becton, Dickinson, and Company
3. Roche Diagnostics
4. Pall Corporation
5. Bio-Rad Laboratories Inc
6. Danaher Corporation
7. IDEXX Laboratories Inc
8. Pro-lab Diagnostics Inc
9. QIAGEN N.V.

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Recent Development

• February 2024- Thermo Fisher Scientific introduced an advanced Legionella testing kit that utilizes next-generation sequencing (NGS) technology. This development is intended to provide more comprehensive results and improve the management of Legionella outbreaks.
• February 2024- Normec Maritime Testing Services (MTS) launched a user-friendly water testing method that allows non-specialized personnel, such as ship crews, to perform Legionella testing efficiently. This innovation aims to simplify the testing process in maritime environments, which are often at high risk for Legionella contamination.
• May 2024- The Dubai Central Laboratory unveiled a new artificial intelligence technology to detect Legionella bacteria. This cutting-edge AI tool is expected to significantly reduce the time required for testing, making it a valuable resource for timely interventions.

Analyst Opinion

The Legionella testing market is witnessing significant growth, driven by increased awareness of waterborne diseases and stringent regulatory requirements for water safety across various sectors. The market revenue has steadily risen, with a notable compound annual growth rate (CAGR) reflecting the surging demand for advanced testing solutions. This growth is particularly evident in the healthcare, hospitality, and industrial sectors, where water safety is critical.

Market insights reveal that technological advancements, such as developing more accurate and rapid testing methods, contribute to this market expansion. These innovations enhance detection rates and offer more cost-effective and efficient testing processes, thus attracting a broader customer base. The competitive landscape is marked by critical players heavily investing in R&D to improve their offerings and capture a larger market share.