How often must water quality samples be collected?

The requirement to collect water quality samples regularly—often on a monthly or quarterly basis—reflects the need to monitor and ensure safe drinking water standards in public water systems. The frequency of sampling is influenced by various factors, including local regulations and the specific characteristics of the water source. Regular sampling helps identify any potential contaminants and maintain compliance with health and safety regulations. It allows for timely detection of changes in water quality, which is crucial for protecting public health.

In many jurisdictions, sampling frequency is established to address specific risks associated with local water sources, making option B the most accurate choice. This approach ensures that adequate monitoring is performed without overwhelming the system with excessive sampling, which is less practical and could divert resources away from addressing actual water quality concerns.