LEAD test is conducted by a Nationally Certified Lab giving you access to commercial grade accuracy. Test results will confirm if your water exceeds the Federal Maximum Contamination Limits set by the EPA for human consumption (15ppb in 2019). Laboratory and testing is located and conducted in the U.S. Water test results will be emailed directly to you. Made and Assembled in the USA. *The EPA's action level for lead in water is 15 parts per billion. *Medical studies have shown that metal toxins affect and lower the immune system. In some instances the immune system appears to be sensitive to the toxic heavy metal lead as compared to other toxicological parameters. Get the very best value in accuracy and dependability for your family's drinking water safety.