For multiple years we have used top-quality testing facilities that can detect amounts as low as .00125 ppm for lead, as well as other heavy metals. As a frame of reference, the EPA allows up to .015 ppm of lead in our drinking water and .005 in bottled water. In all of our years of testing of our brewed tea, we have found that heavy metals, including lead, are significantly below the allowable levels of lead in both bottled water and tap water.