Which of the following is a primary reason for analyzing bacteriological samples?

Analyzing bacteriological samples is primarily conducted to check for the presence of harmful bacteria. This is essential because the safety of drinking water directly impacts public health. Harmful bacteria can cause various waterborne diseases and health issues, making it crucial to identify any contamination in water distribution systems. Regular bacteriological testing helps water utilities ensure that microbial pathogens are within acceptable limits, thereby protecting the health of the community.

While maintaining sufficient chlorine levels is important for disinfection, it does not directly involve the analysis of bacteriological samples, nor does it give complete assurance that harmful bacteria are absent. Additionally, assessing water flavor and determining weather impact, although relevant to water quality, are not the primary objectives of bacteriological analysis, which focuses specifically on the microbiological safety of the water supply.