We have rigorously tested our machine with several labs around the world to ensure that you are getting the safest water at home. We are currently pursuing certification for NSF/ANSI 58 (Reverse Osmosis) through the Water Quality Association (WQA), the leading voice of the residential, commercial, industrial and small community water treatment industry, representing more than 2,500 manufacturers, suppliers and dealers worldwide. We have already received our NSF/ANSI 372 certification, indicating that our product is lead-free. Here.