It is a commonly encountered species in wet buildings. Aureobasidium pullulans is both a soil and leaf (phylloplane) fungus. In indoor environments, it is very common on wet wood and window frames, in floor, carpet, and mattress dust, damp walls, and in humidifier water. It is occasionally found on a wide range of stored foodstuffs and cereals (such as wheat, barley and oats). Sometimes it occurs on meat in cold stores as it can grow at very low temperatures.

Aureobasidium pullulans is associated with occupational disease in wood processing. It has also been isolated from human skin and nails.

Strains of Aureobasidium pullulans are used in various standard tests for resistance to microbial degradation.

You can learn about other common mold types here.