“Are there Federal regulations or standards regarding mold?”
That article at the EPA Website states, “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.”

The United States Toxic Mold Safety and Protection Act, or the Melina Bill, was introduced in Congress in 2002, 2003, and 2005 (see “History” section on previous link), but apparently never received a vote.

This Bill was introduced by United States Representative John Conyers, Jr. of Michigan.

The Bill’s impetus (and name) originates from the horrendous experience of one of Congressman Conyers’ own staff members, Pam Walker. Her nine-year-old daughter, Melina, lost 70 percent of her lung capacity shortly after the family moved into a house infested with high levels of the mold Stachybotrys sp.