Which activity does NOT represent a good practice in drinking water protection?

Using unregulated pesticides near water sources is not a good practice in drinking water protection because such actions can introduce harmful chemicals into the groundwater and surface water systems. Unregulated pesticides may contain substances that can contaminate drinking water supplies, posing significant health risks to the public. This practice goes against established guidelines that prioritize the safeguarding of water resources by avoiding potential pollutants.

In contrast, monitoring for pathogens and nutrients is essential for ensuring the safety and quality of drinking water, as it helps identify any contamination that may affect public health. Establishing buffer zones around wells is an effective strategy to create a protective perimeter that minimizes the risk of contamination from surface activities. Reducing runoff from agricultural areas also represents sound environmental practice, as it helps limit the introduction of fertilizers, pesticides, and sediments into water sources, thus maintaining the integrity of drinking water supplies.