Florida Wastewater Practice Test

What is a common indicator of water pollution in recreational waters?

1. Phosphorus levels

2. Presence of coliform bacteria

3. Specific conductance

4. Water temperature

The correct answer is: Presence of coliform bacteria

The presence of coliform bacteria is a significant indicator of water pollution in recreational waters due to its relationship with fecal contamination. Coliform bacteria, particularly E. coli, are commonly found in the intestines of warm-blooded animals, including humans. When these bacteria appear in water, it suggests that fecal material may be present, which can carry harmful pathogens and lead to illnesses if people come into contact with the contaminated water. Monitoring coliform levels is crucial for ensuring public health in recreational areas where swimming and other water activities occur. Other indicators, while they have their own environmental implications, do not directly signify recreational health risks in the same way. For instance, phosphorus levels can indicate nutrient pollution but do not directly reflect the presence of pathogens. Specific conductance can be useful for understanding water chemistry but is not a direct indicator of contamination. Water temperature might play a role in the overall ecology of a water body but does not directly indicate pollution levels. Therefore, the presence of coliform bacteria is the most relevant indicator for assessing the safety of recreational waters.