The ABPA Harrington-Arthur Memorial Scholarship Essay Competition was established to reward students that seek to increase their knowledge and understanding of how Cross-Connection Control and Backflow Prevention help ensure safe drinking water. Backflow Prevention is designed to prevent dangerous - and sometimes fatal - bacteria, chemicals, and other harmful agents from entering the local water supply systems. Backflow Prevention programs are essential to ensure that the water that reaches your home, school or place of business is as safe and pure as it was when it left the water treatment plant. Essays must be between 700 and 1,200 words.