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How to Identify and Remove Green Mold

green wet brick, moist and fungus on brick wall, old rough brick texture wall pattern

Mold is a pervasive nuisance, especially when it grows indoors. Spores also thrive in the outdoor environment, where airborne mold spores can meander into buildings and homes. Mold can grow in a variety of hues, including green, but multi-colors do not make spores any less harmful.

Mold itself is a type of fungus. Over 100,000 variations of mold flourish in our natural world. Nourished with a combination of moisture, darkness and an organic food source, mold can rapidly multiply. These minute organisms boast a range of colors, including green, white, black, purple, or orange.

Health Effects of Mold


In small amounts, mold is generally harmless; but when extensive, mold can cause health issues. Mold can release spores that humans might unintentionally breathe in. People who are sensitive to mold and those who inhale several spores can become ill.

People with mold sensitivity develop symptoms, like a stuffy nose, itchy skin and eyes, and wheezing. Asthma sufferers and those specifically allergic to mold may have more severe reactions. These individuals may respond to mold exposure with fever and shortness of breath.

Clearly, mold is an organism that can cause sickness. But mold can also be the cause of structural issues within a building. Mold colonies eat away at porous materials, leading to instability and perilous conditions. Collapsed ceilings and fallen walls are just two examples of structural damage.

But is all mold harmful? In short, yes. Whether the mold is orange, purple, black or green, the spores contain an element that is dangerous to humans. Even green mold, with its range of shades, is a cause for concern when it latches on to indoor surfaces and multiplies.

What is green mold?

green wet brick, moist and fungus on brick wall, old rough brick texture wall pattern

Green mold, in general, is a term used to describe mold species that grow in any shade of green. Its physical characteristics include appearing fuzzy and soft or powdery. Green mold can assume a wide range of greenish hues. Be unmistaken, however, as green mold is no less harmful.

All sorts of mold species can develop green coloring. Three indoor mold species, however, are the most common: Cladosporium, aspergillus and penicillium. While these specific molds can grow to be green, they can also take on other colors, such as blue or black.

Cladosporium can be visually identified by its olive-green color. This species of mold thrives mostly on plants, but grows on household surfaces, like walls and carpeting, too. Aspergillus grows on spoiled food, such as bread. Penicillium favors cold environments, like soil, and can release toxic mycotoxins.

How is green mold identified?

Green mold can flourish in damp areas. If the suspected growth appears greenish, it is likely to be green mold. Be aware, however, that green mold can look different on surfaces of varying colors, making it somewhat difficult to recognize whether or not the splotches are truly green mold.

Plus, green mold commonly grows side by side with black or pink mold. While a visual inspection of the moldy, green-hued areas can provide some indication of whether or not it is green mold, only a laboratory test can accurately determine if the growth is actually green mold.

Property owners can rely on mold testing kits to gather evidence of the type of mold in their home or commercial building. A variety of DIY mold test kits are available at local hardware stores and range in costs from under ten dollars to around thirty dollars, although they are not very effective.

What are DIY mold removal techniques?Black mold in the corner of room wall. Preparation for mold removal.

Once spotted and identified, green mold should be promptly removed. The key to successful mold remediation is stopping the moisture source. Homeowners should repair a leaky pipe, caulk the foundation cracks, and seal gaps in basement windows to end the water intrusion—and, therefore, the mold problem.

Also make an effort to control the indoor humidity levels to between 30 and 50 percent. Whisk away excess moisture with a dehumidifier or AC. Ensure the kitchen, bathrooms and laundry room have adequate ventilation. In the event of indoor flooding, thoroughly clean and dry the affected areas.

Food sources for green mold are no different than those for orange, black or purple mold. All mold spores thrive on abundant moisture and a nutrient-rich food source, like drywall, clothing, or wood. When indoor dampness comes to a screeching halt, the mold has no recourse but to die off.

Moisture control is a homeowner’s first choice of weapon in the fight against green mold. Any lingering mold colonies can be effectively killed off with a fungicide. In addition to commercial products, a bleach solution of one cup bleach in one gallon of water will destroy the remaining mold spores.

When applying a bleach solution to surfaces contaminated with green mold, take safety precautions. Never mix bleach with ammonia or other cleaners, as doing so releases toxic fumes. Open windows to allow air circulation. Also wear protective eyewear and gloves when handling bleach.

When should pros be called?


Eliminating minor green mold growth can be a homeowner’s DIY weekend task. But extensive growth should be handled by a professional mold remediation company, like ServiceMaster. Our business is to destroy mold and prevent spores from returning.

Our ServiceMaster technicians will successfully eradicate mold through our proven mold remediation processes. We use infrared technology to detect all areas of hidden mold, even unseen growth behind walls. Our specialists apply powerful yet environmentally safe chemicals to kill the spores.

Green mold—and molds of any hue—is notorious for causing a host of structural damage to homes and buildings. ServiceMaster pros respond immediately to calls. We clean and then repair all materials and surfaces damaged by the exposure to the pesky green mold.

Prevent health issues and property damage by promptly addressing the green mold in your home or commercial space. ServiceMaster recognizes the urgency of a rapid response, which is why we offer emergency mold removal services to homes and businesses in the Lincoln, Grand Island and Omaha, NE areas.

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