Water

This cause name is ambiguous, so it is interpreted as contaminated drinking water rather than water itself. Clean water is essential and not a cancer cause. Cancer relevance comes from contaminants. NCI identifies arsenic in drinking water as associated with increased bladder and skin cancer risk, and environmental reviews include waterborne contaminants among harder-to-avoid exposure routes. Other concerns can include radon in well water, industrial chemicals, nitrates, PFAS, or disinfection byproducts depending on local water source and treatment. The record should be renamed if the intent is a specific contaminant.