This seminar course is designed to teach an understanding of the basic principles of water pollution and water pollution issues on local, regional and global scales. The course will begin with a discussion of the basic chemical, physical and biological properties of water and water contaminants. Subsequent lectures will cover specific chemical and biological contaminants in ground, surface, and marine waters; sources, fate, transport, and transformation of contaminants; monitoring techniques, water source protection and resource management; water and wastewater treatment; transmission of waterborne disease; toxicological concerns of chemicals in water, including disinfection byproducts; and interactions with the air and land environments. Invited lecturers will cover issues such as harmful algal blooms, groundwater modeling, coastal zone management, and US regulatory approaches and policies for aquatic ecosystem protection. Course Activities: Class discussions, homework assignments, exams and final project. Course Activities: Class discussions, homework assignments, exams and final project. THIS CLASS HAS PRIORITY ENROLLMENT. Any student who does not meet the Wave 1 or Wave 2 criteria can add themselves to the waitlist (if enrollment requirements are met) at any time during the enrollment period. At the beginning of each priority wave, students on the waitlist who meet the Wave’s criteria will be automatically enrolled into any remaining seats in the course (pending no time conflicts). **Cross-Registrants and Non-Degree Students will be enrolled on a space available basis after the enrollment deadline for the course. Course Requirements: Students outside of HSPH must request instructor permission to enroll in this course.