What is the focus of the Total Coliform Rule (TCR)?

The focus of the Total Coliform Rule (TCR) is on ensuring the safety of drinking water by testing for coliform bacteria, which are indicators of potential contamination by pathogens. The presence of coliform bacteria suggests that the water could be contaminated with fecal material, and therefore it poses a risk to public health.

The TCR establishes standards for the monitoring and testing of these bacteria in drinking water systems. By requiring regular testing for coliform bacteria and maintaining adequate chlorine residual levels to disinfect the water, the TCR aims to protect consumers from waterborne diseases.

Other options, such as controlling chemical contaminants or regulating heavy metals like copper and lead, pertain to separate regulations that address different safety and health concerns in water supply. Monitoring water pressure is also a crucial aspect of water utility management but does not fall under the scope of the TCR.