U.S. Legionella Testing Market Expected to Reach USD 191.1 Million by 2033 - IMARC Group

U.S. Legionella Testing Market Statistics, Outlook and Regional Analysis 2025-2033

The U.S. legionella testing market size is anticipated to reach USD 98.0 Million in 2025, and it is expected to reach USD 191.1 Million by 2033, exhibiting a growth rate (CAGR) of 8.7% from 2025-2033.

The rising Legionnaires' disease incidences in the US are driving demand for novel testing, especially in healthcare, hospitality, and municipal water systems. In April 2023, health authorities in Grand Rapids, Minnesota, launched an investigation into a Legionnaires' disease outbreak. By March 2024, 15 cases had been identified in the area, marking a threefold increase compared to the total cases. Increased regulatory scrutiny and public health concerns are encouraging proactive monitoring and risk mitigation techniques for high-risk institutions and infrastructure.

Additionally, the increasing emphasis on water quality in federal buildings is expanding the need for Legionella testing. Stricter maintenance protocols and routine monitoring are reinforcing preventive measures to control bacterial growth. In January 2024, GSA conducted water testing in federal buildings to ensure the safety of occupants. This helped building managers to maintain a healthy environment by reducing heavy metals and preventing the growth of harmful bacteria like Legionella. Regulatory oversight and health-focused initiatives are driving demand for comprehensive water system assessments, ensuring compliance, and safeguarding occupants from waterborne pathogens in public and commercial infrastructure. Besides this, innovations in legionella testing are making detection faster, more accurate, and cost-effective. Traditional culture-based methods require long incubation times, delaying responses to contamination. Newer technologies, such as polymerase chain reaction (PCR), immunoassays, and on-site rapid test kits, provide quicker results, allowing facility managers to take immediate corrective actions, further propelling the market growth.

U.S. Legionella Testing Market Statistics, By Region

The market research report has also provided a comprehensive analysis of all the major regional markets, which include the Northeast, Midwest, South, and West. The rising temperatures and extreme weather conditions in the US are elevating the need for testing procedures.

Northeast Legionella Testing Market Trends:

Legionella testing regulations are becoming stricter in the Northeast, especially in cities like New York and Philadelphia, where outbreaks have occurred. For instance, in September 2024, water testing at a federal building in Lower Manhattan, New York, detected Legionella bacteria in multiple locations, further propelling the growth of the market.

Midwest Legionella Testing Market Trends:

The Midwest is seeing more demand for rapid Legionella testing, particularly in states like Illinois, Michigan, and Ohio, where outbreaks have led to stronger preventive measures. In February 2024, Legionella bacteria, which can cause the disease, was detected at Cleveland Clinic Mercy Hospital in Canton, Ohio, which is accelerating the industry growth.

South Legionella Testing Market Trends:

The South faces a greater Legionella risk due to warm and humid conditions, leading to more frequent testing in Florida and Georgia. Moreover, in Florida, there’s more focus on testing water in schools. With cases of Legionnaires’ disease affecting teachers and staff, schools are taking extra steps to keep their water systems safe and protect everyone. For example, in November 2024, a kindergarten teacher at Petersburg Elementary School, Florida, died after testing positive for bacteria that leads to the disease.

West Legionella Testing Market Trends:

In the West, states like California, Washington, and Oregon are focusing more on Legionella monitoring. California requires testing in recycled water systems. In places like San Francisco and Seattle, tech companies use smart tools to detect legionella in cooling towers. After wildfires, hospitals and public buildings in California and Oregon are stepping up legionella testing to ensure water safety.

Top Companies Leading in the U.S. Legionella Testing Industry

The market research study encompasses an analysis of the competitive landscape. In January 2025, Legionella Control Systems introduced the Legionella Dominator, an advanced water softener designed to reduce legionella risks while optimizing water softening efficiency in the US. Apart from this, the US General Services Administration implemented water quality initiatives in federal buildings to minimize the risk of contaminants like Legionella.

U.S. Legionella Testing Market Segmentation Coverage

• On the basis of the application, the market has been bifurcated into water testing (microbial culture, DFA stain, PCR, and others) and IVD testing (blood culture, urine antigen test, DFA stain, PCR, and others). Water testing focuses on monitoring cooling towers, plumbing, and public water systems, while IVD testing ensures rapid diagnosis in healthcare settings. It assists in enhancing patient outcomes.
• Based on the end user, the market has been bifurcated into diagnostic laboratories, hospital and clinics, and others. Diagnostic labs perform water and clinical testing. Apart from this, hospitals and clinics use IVD tests to diagnose Legionnaires' disease in patients, ensuring timely treatment and preventing outbreaks.

Browse IMARC Related Reports on Legionella Testing Market:

• Legionella Testing Market Report