Taste and odor in water can originate from algae, bacteria, organic matter, gases, and chemicals.

Taste and odor in water can originate from algae, bacteria, organic matter, gases, and chemicals.

• A. TRUE
• B. FALSE
• C. Only inorganic sources
• D. Only from plants

Answer: (A)

Taste and odor in drinking water come from a variety of sources, not just one type of contaminant. Algae and bacteria can produce earthy, musty, or even sulfur-like smells and tastes through the compounds they release. Algal blooms, for example, release substances such as geosmin and 2-MIB that are detectable even at very low concentrations and can linger despite treatment. Microbial activity also creates byproducts that affect odor and flavor. Organic matter from decaying leaves and other natural material contributes humic and fulvic substances that impart earthy or moldy notes. Gases dissolved in water, like hydrogen sulfide, produce sulfur smells, while certain inorganic chemicals and disinfection byproducts can also alter taste and odor. Because these compounds can be sensed at very low levels, water utilities monitor and manage them to keep taste and odor acceptable. So the statement is true since many different origins—algae, bacteria, organic matter, gases, and chemicals—can all influence taste and odor. The other choices are too restrictive, excluding several legitimate sources of taste and odor.

Taste and odor in drinking water come from a variety of sources, not just one type of contaminant. Algae and bacteria can produce earthy, musty, or even sulfur-like smells and tastes through the compounds they release. Algal blooms, for example, release substances such as geosmin and 2-MIB that are detectable even at very low concentrations and can linger despite treatment. Microbial activity also creates byproducts that affect odor and flavor. Organic matter from decaying leaves and other natural material contributes humic and fulvic substances that impart earthy or moldy notes. Gases dissolved in water, like hydrogen sulfide, produce sulfur smells, while certain inorganic chemicals and disinfection byproducts can also alter taste and odor. Because these compounds can be sensed at very low levels, water utilities monitor and manage them to keep taste and odor acceptable. So the statement is true since many different origins—algae, bacteria, organic matter, gases, and chemicals—can all influence taste and odor. The other choices are too restrictive, excluding several legitimate sources of taste and odor.