Legionella Testing

Discover reliable Legionella testing by MSE Environmental. Our Legionella Testing Procedure is committed to ensuring safety and compliance with OSHA and EPA regulations. Legionella bacteria, which can cause serious illnesses such as Legionnaires' disease and Pontiac fever, thrive in stagnant water and man-made water systems. Early detection through waster sample analysis and ongoing vigilance are critical for public health, helping to prevent large-scale outbreaks.

MSE Environmental uses advanced polymerase chain reaction techniques to detect Legionella. Our expertise in Legionella testing ensures adherence to OSHA and EPA regulations, allowing us to effectively monitor and control potential threats. By partnering with us, you can ensure the safety and compliance of your water systems. We align with the guidelines set by the Centers for Disease Control and Prevention (CDC).

Common Locations Where Legionella Can Be Found. legionella testing

Understanding Legionella

Legionella Bacteria and Its Characteristics

Legionella bacteria are a group of pathogenic microorganisms that thrive in water environments, particularly in stagnant water. These bacteria are common in freshwater systems but can pose a public health risk in man-made water systems.

Common Locations Where Legionella Can Be Found

Legionella bacteria are present in a range of settings, such as:

  • Hot tubs

  • Cooling towers

  • Plumbing systems

  • Decorative fountains

  • Water heaters

  • Showerheads and faucets

These locations provide the warm, nutrient-rich conditions that promote the growth and spread of Legionella.

Explanation of Legionnaires' Disease and Pontiac Fever

Legionnaires' disease and Pontiac fever are the two primary illnesses caused by Legionella bacteria. Legionnaires' disease is a severe sort of pneumonia that can be fatal, particularly for those with compromised immune systems. Pontiac fever is a milder, flu-like illness that does not result in pneumonia but requires medical attention.

Symptoms and Severity of Legionnaires' Disease

Legionnaires' disease can manifest with a range of symptoms, including:

  • High fever

  • Chills

  • Cough

  • Muscle aches

  • Headaches

  • Shortness of breath

Legionnaires' disease can cause respiratory failure, septic shock, and acute kidney failure if untreated.

Symptoms and Impact of Pontiac Fever

Pontiac fever presents with symptoms similar to those of the flu, such as:

  • Fever

  • Headaches

  • Muscle aches

  • Fatigue

Pontiac fever, albeit less severe than Legionnaires' disease, can pose a health risk and require medical attention.

The Importance of Legionella Testing

The Role of Legionella Testing in Ensuring Safety and Compliance

Legionella in waters

Legionella testing is critical in maintaining public health and ensuring compliance with OSHA and EPA regulations. Regular testing helps to detect Legionella bacteria early, allowing for timely intervention and control measures. This preventive method prevents Legionella from spreading in water systems and protects exposed people.

  • How Regular Testing Prevents Large-Scale Outbreaks

Regular Legionella testing is vital in monitoring and controlling the presence of the bacteria in water systems. By routinely analyzing water samples, potential outbreaks can be identified and focused on before they escalate into large-scale health emergencies. This ongoing vigilance is vital to managing the risks associated with Legionella. Cooling towers, hot tubs, and plumbing systems are ideal for bacteria growth. 

  • The Benefits of Early Detection in Reducing Health Risks

Early detection of Legionella bacteria significantly reduces health risks by enabling prompt and effective remediation efforts. Before Legionnaires' disease or Pontiac fever, the bacteria can be identified and remedied to protect sensitive groups. This early intervention minimizes health risks and helps avoid the costly implications of widespread outbreaks.

MSE Environmental’s Commitment to OSHA and EPA Regulations

At MSE Environmental, we are dedicated to upholding the strictest safety standards and compliance with OSHA and EPA regulations. Our Legionella testing procedure is designed to detect Legionella bacteria accurately. This ensures that all necessary steps are taken to control and prevent its spread. Our services comply with regulatory requirements, ensuring our clients' water systems are monitored and managed to protect public health.

Our Legionella Testing Services

MSE Environmental's Legionella Testing Process

At MSE Environmental, we provide thorough and reliable Legionella testing services to ensure the safety and compliance of your water systems. Our comprehensive testing process includes:

legionella testing procedure, MSE Environmental's Legionella Testing Process
  • SAMPLING: Sampling Methods and Locations

    • We utilize precise sampling methods to collect water samples from locations where Legionella bacteria are likely present. Common sampling sites include:

      • Cooling towers

      • Hot tubs

      • Plumbing systems

      • Decorative fountains

    • Targeting these high-risk areas ensures that our Legionella testing is comprehensive and effective in detecting potential contamination.

  • TESTING: Advanced Testing Methods Used for Accuracy and Reliability

    • MSE Environmental employs advanced testing methods, such as culture techniques and polymerase chain reaction (PCR), to provide accurate and reliable results. These methods are essential for:

      • Detecting Legionella bacteria, even in low concentrations

      • Differentiating between various species and serogroups

      • Ensuring precise identification and quantification of the bacteria

    • Our state-of-the-art testing procedures meet the highest industry standards, guaranteeing the reliability of our results.

  • REPORTING: Detailed Reporting and Analysis of Results

    • Upon completion of the testing, we provide detailed reports that include:

      • Comprehensive analysis of water sample results

      • Identification of any detected Legionella bacteria

      • Assessment of the potential risk level

    • We write comprehensive reports to help you comprehend the findings and repair steps.

  • CONSULTATION: Expert Consultation for Prevention and Control Strategies

    • MSE Environmental offers expert consultation services to help you implement effective prevention and control strategies. Our team of specialists will work with you to:

      • Develop tailored Legionella management plans

      • Implement control measures to reduce bacterial growth

      • Ensure ongoing vigilance and monitoring of your water systems

    • Our guidance will help you proactively manage Legionella threats to protect water system users.

Health Risks and Impacts of Legionella

Detailed Explanation of the Health Risks Posed by Legionella

Legionnaires' Disease: Symptoms, Severity, and Potential Complications

Legionnaires' disease is a harsh form of pneumonia caused by inhaling aerosolized water droplets containing Legionella bacteria. Symptoms commonly appear 2 to 10 days after exposure and may include:

  • High fever

  • Chills

  • Cough (which may bring up mucus or blood)

  • Shortness of breath

  • Muscle aches

  • Headaches

  • Fatigue

The severity of Legionnaires' disease can vary, but it often requires hospitalization and can lead to severe complications such as:

  • Respiratory failure

  • Septic shock

  • Acute kidney failure

  • Multi-organ dysfunction

Legionella testing must be done quickly and accurately to prevent significant health issues.

Pontiac Fever: Symptoms and Impact on Daily Life

Pontiac fever is a milder illness also caused by Legionella bacteria. Unlike Legionnaires' disease, Pontiac fever does not result in pneumonia and usually resolves independently without medical treatment. Symptoms commonly appear within 24 to 48 hours of exposure and can include:

  • Fever

  • Headaches

  • Muscle aches

  • Chills

  • Fatigue

Pontiac fever, less severe than Legionnaires' disease, can debilitate daily life and require time off work or school.

Historical Outbreaks and Case Studies

The 1976 American Legion Convention Outbreak

One of the most notable Legionella outbreaks occurred in 1976 during an American Legion convention in Philadelphia. This outbreak brought global attention to the dangers of Legionella bacteria after 221 attendees fell ill and 34 succumbed to the disease. The event led to the identification of the bacteria and highlighted the need for stringent Legionella testing and control measures.

Notable Outbreaks in Hospitals, Hotels, and Workplaces

Legionella outbreaks have occurred in various settings, emphasizing the importance of ongoing vigilance and monitoring. Some notable cases include:

  • Hospitals: Outbreaks in healthcare facilities have resulted in severe illness and fatalities, especially among immunocompromised patients.

  • Hotels: Contaminated water systems in hotels have led to large-scale infections among guests, resulting in significant health and financial repercussions.

  • Workplaces: Industrial cooling towers and plumbing systems in workplaces have been sources of Legionella contamination, posing risks to employees' health.

Historical outbreaks demonstrate the importance of regular Legionella testing to prevent and control outbreaks and ensure public health and regulatory compliance.

Preventing Legionella Contamination

Importance of Regular Legionella Testing for Maintaining Health and Safety

Regular Legionella testing is crucial in maintaining a safe and healthy environment. By detecting Legionella bacteria early, organizations can promptly prevent potential outbreaks. Ongoing vigilance through routine testing ensures compliance with OSHA and EPA regulations, ultimately safeguarding public health.

Preventive Measures to Control Legionella in Water Systems

legionella bacteria, legionella testing and inspection, Preventive Measures to Control Legionella in Water Systems
  1. Regular Maintenance and Cleaning of Water Systems

    • Routine maintenance and thorough cleaning of water systems are vital in controlling Legionella bacteria, which include the following:

      • Flushing water systems regularly to prevent stagnant water, which can promote bacterial growth

      • Descaling and disinfecting hot tubs, cooling towers, and plumbing systems to remove biofilm and other contaminants

      • Inspecting and maintaining all water-related equipment to ensure proper functioning and cleanliness

  2. Temperature Control to Inhibit Bacterial Growth

    • Managing water temperatures is an effective strategy to prevent Legionella contamination. The bacteria thrive in water temperatures between 20°C and 45°C (68°F and 113°F). Preventive measures include:

      • Heating water above 60°C (140°F) in hot water systems to kill Legionella bacteria

      • Cooling water below 20°C (68°F) in cold water systems to inhibit bacterial growth

      • Regular monitoring of water temperatures to ensure they remain outside the optimal growth range for Legionella

  3. Implementation of Comprehensive Water Management Plans

    • Developing and implementing comprehensive water management plans is essential for controlling Legionella. These plans should include:

      • Risk assessments to identify potential Legionella hazards in water systems

      • Control measures such as filtration, UV treatment, and chemical disinfection to eliminate or reduce bacterial presence

      • Documentation and record-keeping to track maintenance, testing, and corrective actions

Adhering to these preventive measures allows organizations to effectively monitor and control Legionella contamination, ensuring their occupants' and visitors' safety and health.

Regulatory Compliance and Safety Commitment

Overview of CDC, OSHA, and EPA Regulations Related to Legionella Control

Strict regulations by the CDC, OSHA, and EPA govern the control and prevention of Legionella bacteria. These regulations ensure that organizations maintain safe water systems to protect public health. Key regulations include:

  • CDC guidelines for Legionella control in water systems, focusing on the implementation of water management plans

  • OSHA standards mandate regular testing and maintenance of workplace water systems to prevent Legionella outbreaks

  • EPA regulations, oversee the quality of public water systems and enforce measures to detect and mitigate Legionella contamination

How MSE Environmental Ensures Compliance with These Regulations

MSE Environmental is dedicated to adhering to all CDC, OSHA, and EPA regulations related to Legionella control. Our comprehensive Legionella testing procedures are designed to meet and exceed regulatory requirements, ensuring the safety and compliance of our clients. Our approach includes:

  • Routine sampling and testing of water systems to detect Legionella bacteria promptly

  • Thorough documentation of all testing and maintenance activities to demonstrate compliance with regulatory standards

  • Regular updates and drills for our team on the latest regulations and best practices in Legionella control

MSE Environmental’s Proactive Approach to Exceeding Regulatory Requirements for Public Safety

At MSE Environmental, we go beyond mere compliance with regulations to ensure the highest public safety standards. Our proactive approach includes:

  • Up-to-date testing methods, such as polymerase chain reaction (PCR), to accurately detect Legionella bacteria even in low concentrations

  • Customized water management plans tailored to the specific needs of each client, addressing potential Legionella risks effectively

  • Continuous improvement of our procedures and technologies to stay informed of emerging threats and regulatory changes

By prioritizing regulatory compliance and taking a proactive stance on Legionella control, MSE Environmental is committed to safeguarding public health and ensuring the safety of all water systems under our care.

Why Choose MSE Environmental?

MSE Environmental’s Expertise and Experience in Legionella Testing

MSE Environmental is a Legionella testing leader with years of experience and a strong understanding of Legionella bacteria management. Our professionals are up-to-date on testing methods and regulatory regulations to provide the best service and protection.

  • Commitment to Safety and Client Health

At MSE Environmental, the safety and health of our clients are our top priorities. We are committed to providing precise and thorough Legionella testing to prevent the spread of Legionnaires' disease and Pontiac fever. Our rigorous testing procedures and proactive prevention strategies are designed to look after public health and ensure a safe environment.

  • Advanced Testing Methods and Reliable Results

We detect Legionella bacteria accurately and reliably using polymerase chain reaction (PCR) and other cutting-edge procedures. Our testing processes meet OSHA and EPA regulations, giving clients piece of mind about their water systems.

  • Comprehensive Services, Including Consultation and Preventive Strategies

MSE Environmental offers a full range of services to address all Legionella control and prevention aspects. Our comprehensive approach includes:

  • Detailed water sampling and testing: We collect water samples from various locations within your facility to detect any presence of Legionella bacteria.

  • Expert consultation: Our team provides tailored advice on the best practices for managing and controlling Legionella in your water systems.

  • Preventive strategies: We help you implement adequate measures, such as regular maintenance, temperature control, and water management plans, to prevent Legionella contamination.

MSE Environmental is a committed partner dedicated to Legionella testing excellence and environmental health and safety. Our expertise, advanced methods, and comprehensive services make us the trusted choice for all your Legionella testing needs.

What have we learned?

Recap of the Importance of Legionella Testing and Prevention

Preventing Legionnaires' disease and Pontiac fever requires regular Legionella testing of water systems. Legionella bacteria can be identified and treated early to protect public health and comply with OSHA and EPA regulations.

MSE Environmental’s Role in Protecting Public Health Through Advanced Legionella Testing Services

MSE Environmental is dedicated to protecting public health with our comprehensive and reliable Legionella testing services. Our advanced testing methods, expert consultation, and preventive strategies ensure that water systems are safe and compliant with all relevant regulations. We are dedicated to catering to the highest quality of service to help our clients monitor and control Legionella contamination effectively.


Proactively protect your water systems with MSE Environmental's Legionella Testing and prevention services. Visit our website, call us at (888) 258-3860, or email us directly at info@msenational.com. Let MSE Environmental be your trusted partner in safeguarding public health.


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ANSI/ASHRAE Standard 188-2018 compliant

An American National Standard that aims to minimize the potential for Legionnaires’ disease to spread throughout building water systems has been revised.

Click here for the full ANSI/ASHRAE Standard 188-2018, Legionellosis: Risk Management for Building Water Systems

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Centers for Medicare & Medicaid Services (CMS)

Facility Requirements to Prevent Legionella Infections: Facilities must develop and adhere to policies and procedures that inhibit microbial growth in building water systems that reduce the risk of growth and spread of legionella and other opportunistic pathogens in water.

Click here for the APIC.org document on Centers for Medicare & Medicaid Services (CMS) S&C 17-30-compliant water management programs

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OSHA updates (Legionnaires' Disease and Pontiac Fever)

OSHA updated both Chapter 7 of the OSHA Technical Manual and its Legionella eTool, a device intended to assist employers, health care providers, and safety and health professionals when inspecting jobsites for Legionellosis.

Click here for the OHSA.gov information on Legionellosis (Legionnaires' Disease and Pontiac Fever)

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Dental Unit Water Quality - Dental Healthcare

Biofilm is a thin, slimy film of bacteria that sticks to moist surfaces, such as those inside dental unit waterlines. Biofilm occurs in dental unit waterlines because of the long, small-diameter tubing and low flow rates used in dentistry, the frequent periods of stagnation, and the potential for retraction of oral fluids. As a result, high numbers of common water bacteria can be found in untreated dental unit water systems. A few disease-causing microorganisms found in untreated dental unit water include Legionella, Pseudomonas aeruginosa, and nontuberculous Mycobacterium. Dental health care personnel and patients could be placed at risk of adverse health effects if water is not appropriately treated.

Click here for Dental Unit Water Quality