Since its initial publication in 2020, EPA Method 533 has become a leading approved analytical test method for the analysis of PFAS in drinking water. During this time, Merit Laboratories has analyzed thousands of samples utilizing EPA Method 533 for drinking water. In the publication of EPA Method 533 in 2020, Merit Laboratories was just a few national laboratories acknowledged in the approved method for PFAS testing in drinking water released by the U.S. EPA.