Are you familiar with the current water quality criteria for aquatic life and human health?

Your interviewers will likely test the depth of your knowledge and understanding with varying levels of questions pertaining to water quality analysis. You will want to refresh your memory and update yourself thoroughly prior to your interview in anticipation of some of these questions. If you find yourself unsure of an answer, then provide as much relevant information as you're able and acknowledge that you will explore it further following your interview. You do not want to make your answer up on the spot if you are not familiar with the content of the question.