Data interpretation allows you to learn from water quality test results, helps you improve your sampling program and is really the reason you collected the data in the first place. You will need to take a good look at the results and try to understand them to develop final conclusions and recommendations. Besides providing a report of the analysis for given contaminants, most commercial laboratories or portable test kits provide little explanation of the test results. The information provided in this brief will help you understand and interpret your water quality test results.