What is the effect of organic matter in water supplies?

Organic matter in water supplies plays a significant role in influencing various aspects of water quality, particularly through its potential to increase biological activity. When organic materials are present in the water, they serve as a food source for microorganisms, including bacteria and protozoa. This increased presence of nutrients can lead to heightened levels of biological activity, as these organisms thrive and reproduce.

As biological activity increases, several consequences may emerge. For example, a greater microbial population can enhance the decomposition of organic material, which is crucial in maintaining ecological balance in aquatic environments. However, if organic matter levels are excessively high, this can lead to problems such as oxygen depletion and the potential for harmful algal blooms, which can ultimately degrade water quality.

The other options highlight misconceptions regarding the effects of organic matter. Organic matter isn't a nutrient solely for aquatic life; while it serves as food, its effects are broader and can also pose challenges. It does affect water quality rather than having no effect, and it does not universally improve the taste of water; this can vary based on the type and concentration of organic materials present. Therefore, the relationship between organic matter and biological activity is crucial to understanding its impact on water supplies.