On May 27, Muan Sweet Water gained the qualification to be exported to USA through passing all the additional tests of FDA (Food and Drug Administration). In 2007, Muan Sweet Water was confirmed of its safety and excellence at the tests of mineral factors, heavy metals, chemicals' residues, skin reaction, and toxicity through experimental mouse. This time Muan Sweet Water passed the nutrition facts test and gained the qualification to be exported to USA. And at the retest of heavy metals, it was found safe at all the contents. Calcium was measured to be 150mg in Muan Sweet Water and the water was confirmed to be good water to humans again.