What is a chain of custody in water sampling?

A chain of custody in water sampling is crucial because it provides a documented history of the sample from the moment it is collected until it is analyzed. This documentation includes details about who collected the sample, who handled it during transportation, and who conducted the tests. Maintaining an accurate chain of custody is essential to ensure that the sample's integrity is preserved and that the results reflect the true quality of the water being tested. This process protects against any potential contamination or alterations that could occur if the sample is not properly tracked. It also supports the credibility and reliability of the data generated, which is vital for regulatory compliance and for making informed decisions about water quality management.