What result do nutrients from organic pollution often lead to in waterways?

Nutrients resulting from organic pollution, particularly nitrogen and phosphorus, contribute to the proliferation of algae and other aquatic plants through a process known as eutrophication. This excessive growth can lead to a decrease in water quality as the algae consume available oxygen in the water, particularly during decomposition, which creates hypoxic conditions detrimental to aquatic life. Additionally, the increase in algal blooms can impair light penetration, affecting the photosynthesis of submerged plants and leading to further impacts on the ecosystem. Such conditions may also promote the growth of harmful algal blooms, which can produce toxins that are harmful to fish, wildlife, and humans. Therefore, the introduction of nutrients from organic pollution has a direct and negative impact on overall water quality.