What is the Difference Between Black Mold & Mildew?

Black mold and mildew thrive in moist areas of the home and can cause illness in people with allergies.

Black mold and mildew are fungi that grow in moist environments. While black mold is generally more toxic, both mold and mildew can cause illness, especially in people with allergies.

Appearance

Black mold is a toxic fungus that can cause serious health issues in otherwise healthy people. Mildew is typically white or gray and fuzzy or powdery.

Where to Find Mold and Mildew

Mold grows anywhere there is moisture, including on walls and ceilings, while mildew is most often found in bathtubs and showers and on windowsills.

Health Effects

Mold and mildew cause health issues in people with asthma and allergies. Symptoms include eye irritation, nasal stuffiness, wheezing and skin irritation. People with severe allergies may experience more acute symptoms.

Cause of Mold and Mildew

Both mold and mildew thrive on moisture, growing best on damp surfaces and in humid areas.

Avoiding Mold and Mildew

Keeping moisture out of your home can prevent mold and mildew growth. Find and fix all leaks, use exhaust fans in bathrooms and kitchens, and use dehumidifiers and air conditioning systems to reduce moisture. Dry spilled or seeping water quickly and clean visible mold or mildew before it spreads.

References

• Black Mold Removal Guide: The Difference Between Mold and Mildew
• U.S. Environmental Protection Agency: Mold Resources
• Health and Energy: Mold and Mildew