Water treatment plants take source water and treat it so that it is safe to drink. This process includes filtering, disinfecting, balancing the chemistry, taste and odor, and testing for microorganisms. Some treatment plants also operate hydroelectric generating units. Because these functions occur 24 hours a day, a plant operator must sometimes work night shifts. Some of the duties include:

• monitoring computerize controls to insure the proper water flow, pressure, disinfection, and power generation levels;
• collecting water samples for laboratory tests on water quality, disinfection levels, taste and odor, and more;
• inspecting processes and equipment for proper operation;
• calculating chemical mixtures and usage levels;
• inspecting for chemical leaks and failures;
• managing other employees;
• recording data and reports on water quality required by state and federal governments.