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Toxic Mold Testing

Table of Contents

When To Test

Before conducting an onsite inspection, we prioritize understanding your special needs by gathering detailed information about your project directly from you. It’s crucial to recognize that mold spores in the air are invisible to the naked eye, emphasizing the importance of choosing a reliable air testing company. When selecting a service provider, it’s essential to meticulously evaluate their credentials, licensing, insurance, experience, and customer ratings.
Adhering to the strict code of conduct recommended by our formal national organization, we maintain a clear separation between environmental testing and all removal/remediation roles. This separation is crucial for ensuring integrity and accuracy in our services. The rationale is straightforward: if the same entity is responsible for both testing and remediation, it may lead to a con ict of interest, raising questions about the authenticity and accuracy of the information provided. Therefore, our approach ensures that the mold testing, including lab analysis, is conducted independently from the remediation process, guaranteeing unbiased and accurate results for our clients.

How We Test

Nonviable Mold Air

SamplesNonviable mold air sampling plays a critical role in indoor environmental evaluations, providing valuable insights into the air quality and potential health risks within a building. This method involves collecting air samples that are later examined in a laboratory to identify and quantify mold spores, even those that are not currently alive or active. Unlike viable sampling, which focuses on living mold cultures, nonviable sampling captures a broader spectrum of mold presence, including dormant and dead spores that can still cause health problems or indicate past or ongoing moisture issues. The process typically uses specialized equipment like spore traps or air pumps with filters, which capture mold spores over a set period. The collected samples are then analyzed under a microscope, allowing for the identification of various mold species and the estimation of their concentrations in the air. This information is crucial in assessing the indoor air quality, identifying hidden mold problems, and guiding effective remediation strategies.

Nonviable mold air sampling is particularly valuable in scenarios where a comprehensive overview of the mold spore spectrum in the air is necessary to safeguard the health and safety of building occupants.

Mold Swab Samples

Mold swab sampling is an essential technique used in the identification and analysis of mold infestations within various environments. This method involves using a sterile swab, similar to a large Q-tip, which is rubbed over a suspect area to collect a sample of the visible mold. The swab is then sealed in a sterile container and sent to a laboratory for analysis. In the lab, the sample is cultured or directly examined under a microscope to identify the mold species present. This type of sampling is particularly effective for analyzing surface molds and is often used when visible mold growth is localized to a specific area. Mold swab samples can provide detailed information about the types of mold present, which is crucial for determining the appropriate remediation strategy. Additionally, this method can be used to test surfaces after mold removal, ensuring that the area has been adequately cleaned. However, it’s important to note that swab sampling primarily detects surface molds and may not react the overall air quality or hidden mold issues

within a structure. Moreover, when combined with nonviable mold air sampling, it can offer a more comprehensive evaluation, confirming the presence of both surface and airborne molds, including those that are not currently active but may still pose health risks.

Viable Mold Air Samples

Viable air sampling for mold is a critical method used in environmental testing to assess the presence of living, active mold spores in indoor environments. This technique involves capturing air samples on a growth medium, typically in a petri dish containing agar, which is then incubated to allow any living mold spores to grow and multiply. This method specially targets viable, or live, mold spores, offering a clear picture of the currently active mold populations in the air. After incubation, a mycologist or trained laboratory technician can identify and quantify the mold colonies that have grown, providing valuable information about the types and concentrations of live mold present. Viable air samples are particularly useful in scenarios where it is necessary to understand the current active mold situation, such as in healthcare settings or in buildings where occupants are experiencing health issues potentially linked to mold exposure.

This type of sampling can help in determining the potential health risks and guiding effective remediation strategies. However, it’s important to note that viable air sampling does not capture non-viable (dead or dormant) spores, which can also be allergenic or toxigenic, necessitating a comprehensive approach that may include both viable and nonviable sampling methods for a complete assessment of mold presence.

Toxic Mold Remediation

Mold remediation is a critical and detailed process aimed at resolving mold issues within indoor environments. It involves not just the removal of mold but also addressing the underlying moisture sources that facilitate mold growth. The process begins with a thorough inspection and assessment to identify all areas affected by mold. Once the extent of the mold infestation is determined, containment procedures are implemented to prevent the spread of mold spores during the cleanup process. This often involves using physical barriers and negative air pressure systems. The next step is the removal of mold-contaminated materials, which might include drywall, insulation, carpet, or other porous materials. Non-porous surfaces are cleaned with appropriate cleaning agents to kill and remove mold. An essential part of remediation is addressing the moisture problem that led to the mold growth. This could involve repairing leaks, improving ventilation, or adjusting humidity levels.

Post-remediation, the area should be thoroughly dried, and possibly treated with antimicrobial sealants to prevent future growth. Once remediation is complete, a follow-up inspection is necessary to ensure that all mold has been successfully removed and that the environment is safe for occupancy. This process is crucial in restoring a healthy living or working environment and preventing the recurrence of mold problems. Effective mold remediation not only removes existing mold but also implements preventative measures to ensure long-term protection against mold growth, thereby safeguarding the health of the building’s occupants and maintaining the structural integrity of the building.

Post Toxic Mold Verification (Clearance)

Mold verification testing, often referred to as post-remediation verification or clearance testing, is a crucial step in the mold remediation process, ensuring that the indoor environment is safe and the remediation efforts have been successful. However, it’s important to note that achieving absolute “clearance” is not feasible since mold is a natural part of the outdoor environment and can enter indoor spaces easily. Particularly after rainfall, a phenomenon known as a mold “bloom” can occur, where mold spore counts in the air can spike dramatically, potentially affecting indoor air quality. During verification testing, air samples are collected and analyzed to compare the indoor mold spore levels to the outdoor baseline levels. The goal is to ensure that indoor levels are not significantly higher than outdoor levels, indicating effective remediation. It’s also essential to maintain ongoing air quality control even after remediation. Implementing air puri cation systems, such as HEPA filters, can be effective in continuously reducing airborne mold spores indoors. These systems help in maintaining a healthier indoor air quality by filtering out mold spores and other particulates, thereby minimizing the risk of mold-related health issues and ensuring a safer living or working environment. Regular monitoring and maintenance of these air purifiers is necessary to maintain interior air quality.


  • Centers for Disease Control and Prevention (CDC) – Mold: The CDC offers information on mold in the environment, health effects, and prevention tips. CDC Mold Information
  • Occupational Safety and Health Administration (OSHA) – Mold: OSHA provides guidelines on mold in the workplace, including prevention and control measures. OSHA Mold Guidelines

  • World Health Organization (WHO) – Guidelines for Indoor Air Quality: Dampness and Mold: WHO’s report offers international perspectives on the impact of mold and dampness on indoor air quality. 

  • American Industrial Hygiene Association (AIHA) – Mold Resource Center: AIHA offers resources and guidelines for assessing and controlling mold in the indoor environment. AIHA Mold Resources

  • Institute of Inspection, Cleaning and Restoration Certification (IICRC) – Mold Remediation Standards: IICRC provides standards for the remediation of mold-damaged structures and contents. Your chosen remedation company should be a member in good standing with this organization. IICRC S520 Standard