Stachybotrys Chartarum
Commonly known as: Black Mold
What is Stachybotrys Chartarum?
Stachybotrys chartarum is a greenish-black mold that grows on materials with a high cellulose content, such as fiberboard, gypsum board, drywall, and paper. Growth occurs when there is moisture from water damage, excessive humidity, water leaks, condensation, or flooding. Constant moisture is required for its growth.
Appearance
Dark Green / Black
Common Locations
High-cellulose materials like drywall, paper, and wood that have been wet for several days.
Health Risks & Impacts
Exposure to Stachybotrys chartarum may cause health issues in some individuals, particularly those with compromised immune systems, asthma, or allergies. Reported symptoms may include coughing, sneezing, eye and throat irritation, rashes, fatigue, and headaches. Health effects vary significantly from person to person, and not everyone exposed will experience symptoms. If you are experiencing symptoms that you believe may be related to mold, we recommend discussing your concerns with a qualified healthcare professional. A professional mold inspection can help determine whether this mold is present in your property.
Why Visual Identification Is Not Enough
Many mold species look similar to the naked eye, and color alone cannot reliably identify what is growing in your property. Some molds that appear dark may be harmless, while lighter-colored molds can produce concerning mycotoxins. The most reliable way to determine which species is present — and at what concentration — is through professional laboratory-verified mold testing. Air and surface samples analyzed by an accredited lab provide the factual data needed to make informed decisions about next steps.
Prevention & Management
The most effective way to prevent Stachybotrys chartarum is to control moisture. Fix any water leaks promptly, ensure good ventilation in areas prone to humidity, and maintain indoor humidity levels between 30% and 50%. If you suspect you have this mold, professional inspection and testing can confirm its presence before any removal is attempted. Our certified mold testing can provide you with a clear roadmap to address these concerns effectively.
Other Common Mold Types
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