Tempe Arizona Water Distribution Grade 3 & 4 Practice Exam

The appropriate answer is that water treatment processes typically remove microorganisms, chemicals, and sediments. This is because the primary goals of water treatment are to ensure the water is safe for human consumption and to improve its aesthetic qualities.

Microorganisms such as bacteria, viruses, and protozoa can pose significant health risks if present in drinking water. Treatment processes often include chlorination or ultraviolet light exposure to eliminate these harmful organisms.

Chemicals, including pesticides and industrial pollutants, are also targeted during water treatment. Activated carbon filtration and other chemical processes help remove or neutralize these potentially harmful substances.

Sediments, which can arise from runoff and natural erosion, can affect water clarity and cause issues with the infrastructure. Filtration methods are utilized to effectively remove these particles.

This comprehensive approach to filtering out these various contaminants ensures that the water supplied to the public is clean and safe, addressing health concerns and improving overall water quality. In contrast, heavy metals and plastics are typically addressed through more specific treatments, nutrients and vitamins are not commonly considered contaminants, and color and odor are only part of the overall treatment focus.