Which of the following is a common indicator of well contamination?

A common indicator of well contamination is the presence of unusual odors, discoloration, and sediments or floating materials in the water. These factors can signal the introduction of harmful substances or pollutants into the aquifer. For instance, if the water takes on a strange smell, it may indicate organic matter or chemicals have entered the well system. Discoloration, particularly a change from clear to a cloudy or brown appearance, can result from sediment disturbance or the infiltration of contaminants. Additionally, visible sediments or floating materials can suggest that the water is not clean and may pose health risks when consumed.

In contrast, clear water with no sediment indicates that the well water is likely free from visible contamination, which would not raise concerns. Regular water quality readings are a good practice for monitoring but, on their own, do not point directly to contamination. A consistent water flow rate signifies that the well is functioning properly but does not provide information about the water quality itself. Thus, option B uniquely addresses the signs of potential contamination, making it the correct choice.