Most people do not appear to be affected by everyday exposure to mold. Most studies have been done in work settings. It is likely that the level of airborne mold spores that can cause health problems varies for different molds and for different people. How a sensitive person may react to mold depends on several factors including the type of mold, the amount of mold present, the frequency and duration of exposure, family history, and overall health status. People should consult their doctor with individual health concerns or questions.
Mold grows under a fairly wide range of conditions.
However, it is often seen growing in cool, damp places. Mold can be found wherever the right mix of conditions exist. Mold can grow on rotting logs and fallen leaves, especially in moist, shady areas. In gardens, mold can be found in compost piles and on certain grasses and weeds. Mold may be present in many work environments including barns, dairies, bakeries, greenhouses, breweries, upholstery shops, mills, and furniture or woodworking plants.