How to tell if black mold is toxic?

Author: Miss Aglae Parker  |  Last update: Sunday, February 8, 2026

Toxic black mold growth has a more potent and identifiable smell, like the smell of decay, wet soil, or rot. Visually, it may be greenish-black, grayish-black, slimy, or more furry than other forms of mold or mildew.

What does harmless black mold look like?

Although the name implies a uniform coloring, black mold may appear black, dark green, or dark brown. It typically grows as a cluster of round spots with a distinctly wet, slimy appearance. As stated, black mold typically appears fuzzy or furry.

Is it safe to stay in a house with black mold?

Is it okay to be in house with black mold? Black mold can cause health problems. As such, it is not advisable to be in a house with black mold. If a person must stay in a house with black mold, they should try to seal off any areas where black mold is present to reduce contact with it.

What are the 10 warning signs of mold toxicity?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

How do you detect mold toxicity?

Some of the commonly prescribed medical tests for mold sickness are Mycotoxin testing, IGE testing, Scratch Allergy testing GI testing, and DNA testing. Your doctor will often use your environmental report to identify the appropriate corresponding medical test.

What are the symptoms of a mold allergy or reaction to exposure?

Is it safe to clean black mold yourself?

Thus, exposure to the toxicity of black mold can cause harm to our physical health. Cleaning it yourself risks a greatly increased chance of acquiring damaging health conditions by unsettling the toxins into the air. Depending on the frequency of mold exposure, an individual's health can be severely compromised.

How to tell if mold is making you sick?

Signs and symptoms of allergic rhinitis caused by a mold allergy can include:
  • Sneezing.
  • Runny or stuffy nose.
  • Cough and postnasal drip.
  • Itchy eyes, nose and throat.
  • Watery eyes.
  • Dry, scaly skin.

Can mold behind walls make you sick?

It irritates the nose and throat, which can lead to both sneezing and coughing as your body tries to get rid of the irritant. Inhaling mold spores can also trigger coughing in people with allergies or an asthma attack, for those with asthma.

How to tell if your house is toxic?

If you suspect your asthma worsens or is more severe than usual, contact your doctor or medical professional.
  1. Bad Smells In The Home. When there's a bad smell in the home, you can tell. ...
  2. Peeling Wallpaper. ...
  3. Spots On The Wall. ...
  4. Bad Allergies Won't Go Away. ...
  5. Visible Mold Growth. ...
  6. Past Water Damage.

How do you test for black mold?

If you go the DIY route while testing for black mold, you will need to purchase a mold testing kit from a hardware or home repair store, take samples of the air and affected areas yourself, and then send these in to a testing facility, which will report back as to which type of mold is present.

How long until black mold affects you?

The next time the mast cells encounter black mold spores, the mast cells release histamine and other chemicals. Histamine is what causes your immediate allergy symptoms. Your symptoms develop very fast — usually within seconds or minutes. The other chemicals can cause ongoing inflammation.

How bad is it to sleep with black mold?

Mould releases allergens, irritants, and occasionally toxic substances. Inhaling, ingesting, and touching mould can put you at risk of various health issues including allergic reactions and respiratory infections.

How do I know if the black mold in my house is toxic?

Toxic black mold growth has a more potent and identifiable smell, like the smell of decay, wet soil, or rot.

What color is toxic black mold?

Stachybotrys chartarum is the infamous toxic black mold. It often appears as black or greenish-black in color and can be found growing in leaky areas, old decaying wood, paper, and foods.

How to tell the difference between black mold and regular mold?

Black mold is a specific type of mold called Stachybotrys chartarum. Like other types of mold, it usually grows in damp environments, and it is typically black, brown or dark green. Other types of mold appear in varying colors, including green, yellow, brown and gray.

How long does it take for black mold to grow on wet drywall?

mildew and mold will develop within 24-48 hours of water exposure. Even worse, it will continue to grow until steps are taken to eliminate the source of moisture, and effectively deal with the mold problem. Use the diagram on the facing page to assess the extent of mold in your home.

How do I check my house for toxins?

You can use a 3M LeadCheck Swab (found at most hardware stores) to do this; be sure you swab any children's products and imported goods. Conduct a lead risk assessment by a certified inspector before any home remodel.

How to check if your house is making you sick?

If you want to monitor your indoor air quality proactively, you can invest in an air quality monitor. This will help you test if your house is making you sick. These devices constantly check the indoor air quality and provide feedback about the levels of different pollutants.

What is the most toxic thing in your home?

Poisonous Products in Your Home: How to Stay Safe
  • 1/10. Bleach. Bleach can irritate your nose, skin, eyes, and throat. ...
  • 2/10. Drain Cleaner. Lye and sulfuric acid are the main ingredients in drain cleaners. ...
  • 3/10. Carpet Cleaner. ...
  • 4/10. Ammonia. ...
  • 5/10. Air Freshener. ...
  • 6/10. Laundry Detergent. ...
  • 7/10. Antifreeze. ...
  • 8/10. Mothballs.

What are signs of mold sickness?

One of the most common warning signs of mold toxicity is persistent respiratory issues such as coughing, sneezing, and difficulty breathing. If you or your family members experience these symptoms, especially when at home, it could be a sign of mold presence.

How to tell if mold is behind drywall?

Musty Smell

If you think there's mold in your walls, get on your hands and knees and smell the electrical outlets. This might sound silly, but it may help you sense mold if it's growing within walls. Outlets have better access to the area behind the walls. Thus, smelling them can help identify the mold problem.

Does homeowners insurance cover mold?

Homeowners insurance doesn't usually cover mold damage or removal unless it's the result of a covered peril. If the mold in your residence was caused by something sudden or accidental, such as a bursting pipe or some other covered incident on your policy, you may be protected.

How do I test myself for mold toxicity?

Urine mycotoxin tests are ideal for testing yourself (and your family members) for mycotoxin exposure. They're absolutely painless, totally non-invasive, and incredibly easy to use. With just a small amount of urine, our experts will be able to spot up to 15 different illness-causing mycotoxins.

What happens if you are exposed to black mold for a long time?

Long-term exposure to black mold can cause chronic illness. With repeated inhalation of toxic trichothecenes (a type of mycotoxin), some people develop chronic inflammatory response syndrome (CIRS).

What does a mold cough sound like?

The cough is typically dry and non-productive, meaning it doesn't bring up mucus. It is sometimes described as having a "barking" or "hacking" sound.

Previous article
Is an 8 foot privacy fence too high?
Next article
What to do if the oven catches fire during self-clean?