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Legionella Testing Market Size, Share & Trends Analysis Report By Test Type (Culture Methods, Urinary Antigen Tests, Direct Fluorescent Antibody Tests, PCR, Others), By Application (Water Testing, IVD Testing, Other), By End-User (Hospitals, Diagnostic Laboratories, Water Treatment Industries, Others) and By Region (North America, Europe, APAC, Middle East and Africa, LATAM) Forecasts, 2026-2034

Last Updated: August 24, 2026 | Author: Debashree Bora | Format:

Legionella Testing Market Size

The global legionella testing market size was valued at USD 372.83 million in 2025 and is projected to grow from USD 403.81 million in 2026 to USD 764.76 million by 2034, registering a CAGR of 8.31% during the forecast period from 2026 to 2034. North America dominated the legionella testing market with a market share of 36.4% in 2025.

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.

Legionella Testing Market Size

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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.
Legionella Testing Market Size By Segments

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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.
Legionella Testing Market Share By Segments

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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.
North America Legionella Testing Market Revenue Share 2025

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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.

List of Key and Emerging Players in Legionella Testing Market

Merck KGaA
Becton, Dickinson, and Company
Roche Diagnostics
Pall Corporation
Bio-Rad Laboratories Inc
Danaher Corporation
IDEXX Laboratories Inc
Pro-lab Diagnostics Inc
QIAGEN N.V.

Key Industry Developments

June 2026
bioMérieux submitted a 510(k) application to the U.S. FDA for the latest BIOFIRE® FILMARRAY® Gastrointestinal Panels, further expanding its molecular diagnostics platform and strengthening its PCR testing portfolio, including technologies applicable to rapid pathogen detection and environmental microbiology.
May 2026
IDEXX Laboratories expanded its diagnostic testing portfolio with the launch of Taeniid Tapeworm Detection on its Fecal Dx® Antigen Testing Platform, reinforcing its investment in advanced diagnostic technologies alongside its Legiolert® water testing solutions for Legionella detection.
May 2025
The U.S. Centers for Disease Control and Prevention (CDC) updated its guidance on Legionella laboratory testing, reaffirming the combined use of urinary antigen testing (UAT) with culture or molecular (PCR) testing to improve diagnostic accuracy and support outbreak investigations.
April 2025
bioMérieux launched WATCHFIRE™, a molecular wastewater surveillance solution utilizing BIOFIRE® technology to detect pathogens in wastewater. The platform strengthens environmental monitoring capabilities relevant to waterborne pathogen surveillance, including Legionella risk management.

Report Scope

Segmentation

By Test Type 5
  • Culture Methods
  • Urinary Antigen Tests
  • Direct Fluorescent Antibody Tests
  • PCR
  • Others
By Application 3
  • Water Testing
  • IVD Testing
  • Other
By End-User 4
  • Hospitals
  • Diagnostic Laboratories
  • Water Treatment Industries
  • Others

Geographies Covered

North America 2
  • U.S.
  • Canada
Europe 8
  • U.K.
  • Germany
  • France
  • Spain
  • Italy
  • Russia
  • Nordic
  • Benelux
APAC 8
  • China
  • Korea
  • Japan
  • India
  • Australia
  • Singapore
  • Taiwan
  • South East Asia
Middle East and Africa 6
  • UAE
  • Turkey
  • Saudi Arabia
  • South Africa
  • Egypt
  • Nigeria
LATAM 5
  • Brazil
  • Mexico
  • Argentina
  • Chile
  • Colombia
Competitive Coverage Merck KGaA · Becton, Dickinson, and Company · Roche Diagnostics · Pall Corporation · Bio-Rad Laboratories Inc
Research Deliverables Revenue Forecast, Competitive Landscape, Growth Factors, Environment & Regulatory Landscape and Trends

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Frequently Asked Questions (FAQs)

The legionella testing market size is valued at USD 403.81 Million in 2026 and is projected to reach USD 764.76 Million by 2034, at a CAGR of 8.31% during the forecast period 2026-2034.

North America dominated the market with a share of 36.4% in 2025.

The leading players in this market are Merck KGaA, Becton, Dickinson, and Company, Roche Diagnostics.

The legionella testing market is projected to grow at a CAGR of 8.31% during the forecast period of 2026 2034.
About the Author
Debashree Bora
Debashree Bora
Healthcare Lead

Debashree Bora is a strategic healthcare research professional with nearly eight years of hands on experience in market intelligence, encompassing primary research, secondary research, market estimation, and consulting engagements. She specializes in pharmaceutical, biotechnology, medical devices, healthcare services, clinical trials, and healthcare outsourcing sectors, providing actionable insights on evolving industry trends, regulatory landscapes, and competitive dynamics.
Debashree’s research helps global clients evaluate market potential, identify growth opportunities, strengthen commercial strategies, and make informed business decisions.

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