Final answer:
Taste and odor in the drinking water distribution system primarily originate from source water due to various point and nonpoint sources of pollution. However, they can also develop within the distribution system itself.
Step-by-step explanation:
Taste and odor components in the drinking water distribution system are likely to originate from source water. This could be due to pollutants entering water supplies from both point sources and nonpoint sources. Point sources include specific, identifiable locations such as wastewater treatment plants and factories, whereas nonpoint sources are larger and more diffuse, such as runoff from agricultural areas. Taste and odor problems can also arise within the distribution pipes due to biofilm growth or reactions with pipe materials. Treatment plants work to remove these contaminants, and water suppliers often procure and treat water from various sources such as lakes, rivers, reservoirs, and groundwater to ensure the safety of drinking water.