A research tool, called the Environmental Relative Moldiness Index (ERMI), has been developed by the U.S. Environmental Protection Agency, Office of Research and Development (ORD). Dust samples are collected
in a home and DNA from mold in the dust is analyzed. The sample is then compared to the ERMI, an index or scale, which was developed for use in the U.S. The analysis can be used by researchers to estimate the amount of mold in a home as well as indicate some of the types of mold that are present.
EPA does not recommend that homes routinely be tested or sampled for mold. Testing may be done for research. Testing may also be useful to help characterize or identify mold problems in some buildings. Physical inspection for water damage and mold is a key part of current EPA mold remediation guidance.
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