Florida Wastewater Practice Test

Why is the discharge of wastewater containing phosphorus to receiving water a concern?

1. It can lead to an increase in sedimentation

2. It may stimulate growth of nuisance quantities of algae

3. It can cause the water to become acidic

4. It can lead to an increase in bacterial growth

The correct answer is: It may stimulate growth of nuisance quantities of algae

The discharge of wastewater containing phosphorus to receiving water is particularly concerning because phosphorus is a key nutrient that can stimulate excessive growth of algae, often referred to as algal blooms. When there is an overabundance of phosphorus in the water, it can lead to eutrophication, which is the process whereby water bodies become overly enriched with nutrients. This results in the rapid growth of algae, especially blue-green algae, which can create harmful conditions for aquatic ecosystems. These algal blooms can significantly impact water quality by depleting oxygen levels in the water as the algae die and decompose. This, in turn, can harm fish and other aquatic organisms that rely on oxygen to survive. Some species of algae can also produce toxins that are detrimental to both human health and wildlife, making waters unsafe for recreational use and drinking. While factors like sedimentation, acidity, and bacterial growth are also important in the context of wastewater management, the specific link between phosphorus and algal blooms makes it a particularly pressing concern in wastewater discharge scenarios.