Specify the required output
Include sample naming conventions, project numbers, recipients and required report or data formats. Agency-facing projects should identify the actual submission requirements.
Read the analytical basis
Method, fraction, preparation, reporting unit and result qualifiers are part of the measurement. A number separated from that context can be misleading.
Distinguish limits and criteria
A reporting limit describes the analytical result boundary. A permit or comparison criterion is a separate requirement. The method and reporting scope must be able to support that criterion.
Keep the conclusion scoped
Results describe the targets and samples tested. They do not create blanket compliance, treatment certification or an assessment of every possible contaminant.
Related testing & guidance
Technical & service references
Vanguard water-testing menuEPA: Clean Water Act method questionsEPA: Drinking-water analytical methodsSource review: November 8, 2026. The agreed method and project scope govern the testing.