Which of the following levels of turbidity can be considered safe for drinking water?

Safe drinking water should have low turbidity levels because high turbidity can indicate the presence of pathogens, chemicals, or other contaminants that can affect health. A turbidity level of 0-5 NTU (Nephelometric Turbidity Units) is generally considered safe for drinking water, as it signifies clear water that is less likely to harbor harmful microorganisms or pollutants.

At this low range, water treatment processes, including sedimentation and filtration, are effective in maintaining and ensuring the safety of water. In contrast, higher turbidity levels, such as those found in the ranges of 5-10 NTU and above, can pose risks to public health, as they suggest water may be contaminated or inadequately treated. Therefore, the selection of the 0-5 NTU range aligns with safe drinking water standards.