Molds are forms of fungi that are found everywhere. They can be found both indoors and outdoors all year around. You are exposed to them daily in the air you breathe. Some people have symptoms like those of hay fever and the common cold, but the symptoms can last for longer periods. Molds can also aggravate asthma. In addition, some people in wet or moldy buildings may have flu-like symptoms. Most health problems are temporary and can be controlled by limiting exposure to molds.
OSHA’s Say on Mold in the Workplace
OSHA has no specific standards concerning mold and fungi exposure in indoor environments. There are no standards to say how much mold is hazardous to your health. However, visible mold growth or strong mold odors should not be present in the workplace.
Many states have passed legislation applicable to fungal growth in indoor environments.
BLR’s SafetyDailyAdvisor has a wealth of information you should check out on mold in the workplace.
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Causes of Increased Indoor Mold Exposure
Tight building structures
The use of synthetic building materials has sealed the structure and reduced air movement, resulting in higher available moisture contents in building materials, a condition favorable for fungal growth.
Poorly monitored HVAC systems
The installation of heating, ventilation, and air-conditioning systems (HVAC) without properly considering the ecology of microorganisms such as mold has increased our exposure to molds. Air filters and air filtration devices appear to provide a comfortable habitat for mold, especially in high-humidity conditions. HVAC systems recirculate air that contains mold spores and toxins because they do not have effective filter systems to trap the mold spores and toxins.
HVAC systems are often not properly maintained and cleaned.
Humans
Human factors that cause increases in mold-related problems include:
- The fact that we spend more than 90 percent of our time indoors
- The fact that many of us have compromised immune systems from diseases and medications
- The emergence of new and pathogenic organisms. It is becoming evident that our relationship with mold is taking on a new urgency.
Mold Inside a Building
All molds need moisture to grow. Mold seems likely to grow and become a problem only where there is water damage, high humidity, or dampness. Common sources of indoor moisture that can cause mold problems include:
- Flooding
- Roof leaks
- Plumbing leaks
- Damp basements or crawl spaces
- Anywhere moist air condenses on cold surfaces
- Poorly ventilated bathrooms and kitchens
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In addition to moisture, molds need a food source. Molds can live on organic materials that include:
- Drywall
- Wood
- Carpets
- Ceiling tiles
See tomorrow’s Advisor for a checklist to help you find out if you have mold in your facility.