Level 3 Testing is done through an accredited Water Testing Laboratory that uses certified methods and procedures, but they are not certifying the data because you, not a certified professional following a standard sampling protocol including chain-of-custody, took the water sample. With Level 3 Testing, you can order a testing kit that is used to prepare your sample and submit it to the lab. By utilizing a lab, you have the assurance that a water expert had conducted your water test. If your test results reveal the presence of a contaminant that is a cause for concern, you can either proceed to determine the best Treatment options or continue to Level 4 Testing - Certified Testing. Level 3 testing should not be used for any legal matters, as a certified baseline testing, or as an alternative to testing that may be required by a state or federally regulated "Public Water Supply". Level 3 testing should include information related to your surrounding neighborhood or conditions, the type of source, observations from the diagnostic analysis, and any testing conducted as part of the Level 2 analysis.
“Forever Chemicals “PFAS in Drinking Water / GenX / PFOA Compounds