According to the TCR, how often must monitoring occur for systems with greater than 4,900 connections?

The correct answer is that systems with greater than 4,900 connections must conduct monitoring monthly according to the Total Coliform Rule (TCR). This requirement is in place to ensure that larger water systems are consistently tested for coliform bacteria and other contaminants that could pose a risk to public health. Monthly monitoring allows for timely identification of potential issues and helps maintain the safety and quality of drinking water supplied to a large number of consumers. This frequency reflects the increased risk associated with larger systems, which serve more people and may have more complex distribution networks. In contrast, smaller systems may be allowed less frequent monitoring due to their lower risk profile.