Standards or Threshold Limit Values (TLVs) for airborne concentrations of mold, or mold spores, have not been set. Currently, there are no EPA regulations or standards for airborne mold contaminants.

For more information on mold, see our website at www.epa.gov/mold.

You may also be interested in:

• Read the publication, "A Brief Guide to Mold, Moisture, and Your Home" at www.epa.gov/mold/brief-guide-mold-moisture-and-your-home [EPA 402-K-02-003]
  • Una Breve Guía para el Moho, la Humedad y su Hogar está disponible en el formato PDF https://19january2021snapshot.epa.gov/cai/una-breve-guia-para-el-moho-la-humedad-y-su-hogar.  Documento de la agencia EPA número 402-K-03-008.