Which of the following is an indicator of poor water quality?

High turbidity levels are a significant indicator of poor water quality because they reflect an increased concentration of suspended particles in the water. These particles can include silt, clay, organic matter, and microorganisms. High turbidity can impede light penetration, affecting aquatic life by disrupting photosynthesis and reducing the overall ecosystem health. Moreover, turbidity can also harbor harmful pathogens and pollutants. Testing for turbidity is a common practice in assessing water quality, as elevated levels suggest contamination and potential health risks for those consuming or using the water.

Low sediment levels and clear appearance typically indicate better water quality, while moderate temperature alone does not provide sufficient information about water quality without the context of other factors. Therefore, high turbidity emerges as a clear red flag regarding the suitability of water for consumption or recreational use.