The maximum contaminant level goal (MCLG) of known or probable carcinogens is...

The maximum contaminant level goal (MCLG) for known or probable carcinogens is established as zero. This is because the MCLG is a health-based standard aimed at protecting public health. For carcinogens, even the smallest amount can pose a risk to human health, and therefore, the goal is to have no detectable levels in drinking water. This zero tolerance for carcinogenic substances is aligned with the precautionary principle in public health, acknowledging that any exposure to known or probable carcinogens can potentially lead to cancer risk.

This emphasis on zero MCLG specifically highlights the commitment to ensuring water safety and the overarching public health objective of eliminating any risk related to exposure to carcinogens in drinking water.