Why are control samples important in water testing?

Control samples are critical in water testing because they serve as benchmarks for test results. These samples contain known quantities of specific substances or organisms and are used to validate the accuracy and precision of the testing procedures being employed. By comparing the results of unknown samples to those of control samples, technicians can determine if their tests are functioning correctly and producing reliable results.

The data from control samples can help identify any potential deviations in testing methods, ensuring that any positive results in unknown samples can be interpreted with confidence. The presence of control samples ultimately enhances the credibility of the testing process, making it a fundamental part of quality control in laboratory settings.