AWWA Water Treatment Operator Certification Practice Test 2026 – Complete Exam Prep

The primary purpose of disinfection in water treatment is to eliminate pathogens and harmful microorganisms. This process is critical for ensuring that the water supply is safe for human consumption. Pathogens, including bacteria, viruses, and protozoa, can pose significant health risks if ingested, leading to waterborne diseases.

Disinfection methods, such as chlorination, ultraviolet (UV) irradiation, and ozonation, are employed to effectively kill or inactivate these harmful organisms. By doing so, water treatment facilities can provide clean drinking water and protect public health.

While removing odor and taste, increasing mineral content, and stabilizing water temperature can be important aspects of overall water treatment, they do not address the immediate health concerns associated with microbial contamination. Therefore, the essential focus of disinfection is on making water microbiologically safe.