Enhancing Cleaning Verification with Dazo and ATP Testing

Apr 25, 2024 | Ambulatory Facility, EVS, Hospital, Markets, Nursing Home, Services, Solutions, Veteran Home

In the realm of professional cleaning and facility maintenance, ensuring that high-touch surfaces are thoroughly cleaned is paramount, especially in environments like healthcare facilities, educational institutions, and food service areas. Traditional visual inspections, while necessary, can sometimes fall short in confirming whether a surface is genuinely clean at a microbial level. This is where advanced methods like Dazo fluorescent marking and ATP (Adenosine Triphosphate) testing come into play. In this blog post, we’ll explore how these technologies can revolutionize cleaning verification and maintenance protocols.

Understanding Dazo Fluorescent Marking

Dazo, introduced by Ecolab, is a fluorescent gel marking system designed to improve cleaning verification processes. It’s invisible to the naked eye and can be applied to high-touch surfaces. After cleaning, the area can be inspected with a UV light. The absence of the fluorescent mark indicates that the surface has been properly cleaned.

Application of Dazo in Cleaning Verification

  • Marking High-Touch Areas: Apply Dazo to commonly touched surfaces like door handles, light switches, elevator buttons, and handrails.
  • Post-Cleaning Inspection: Use a UV light to inspect these areas after cleaning. If the fluorescent mark is gone, it indicates effective cleaning.
  • Training and Accountability: This system can be a valuable training tool for cleaning staff and helps in holding them accountable for their work.

ATP Testing: A Microbial Perspective

ATP testing measures the presence of Adenosine Triphosphate, an energy molecule found in all living cells, including harmful microbes. This testing can quickly assess the cleanliness of a surface at a microscopic level.

Implementing ATP Testing

  • Surface Swabbing: After cleaning, use an ATP testing kit to swab the surface. The swab is then placed into a handheld device that provides a reading of the ATP levels.
  • Immediate Results: One of the key advantages of ATP testing is the immediacy of the results, allowing for quick corrective action if necessary.
  • Regular Monitoring: Regular ATP testing helps in maintaining consistent cleaning standards and can identify areas that need more attention.

Triage by Areas: Prioritizing Based on Critical Need

In implementing Dazo and ATP testing, it’s important to triage areas based on their critical nature:

  • High-Risk Areas: In settings like hospitals, areas such as patient rooms, operating theaters, and intensive care units are high-risk and should be tested more frequently.
  • High-Traffic Public Spaces: Areas like lobbies, restrooms, and dining spaces in schools and office buildings also warrant frequent testing due to their high usage.
  • Food Preparation Areas: In restaurants and commercial kitchens, regular testing ensures compliance with hygiene standards and food safety regulations.

Advantages of Combining Dazo and ATP Testing

  • Comprehensive Verification: While Dazo ensures that surfaces have been physically cleaned, ATP testing confirms the reduction of microbial contamination.
  • Enhanced Cleaning Protocols: The combination of these methods can lead to the development of more effective cleaning protocols and standards.
  • Data-Driven Approach: This dual approach provides quantifiable data that can be used to assess and improve cleaning practices.
  • Increased Accountability and Training: These methods serve as excellent tools for training staff and holding them accountable for their cleaning responsibilities.


The combination of Dazo fluorescent marking and ATP testing represents a significant advancement in the field of cleaning verification. By adopting these technologies, facilities can ensure a higher level of cleanliness, particularly in areas where hygiene is critical. This not only helps in maintaining health and safety standards but also builds trust and confidence among those using the facilities. In today’s world, where cleanliness and hygiene are more important than ever, embracing such advanced verification methods is a step in the right direction.