Reference summary — not medical advice or a personal risk estimate.
Private well water
Untreated groundwater; may contain naturally-occurring arsenic and other contaminants.
Also known as: well water
IARC-classified factors documented in this product
- Exposure from · Source: IARC
Naturally-occurring arsenic in groundwater varies geographically.
How to read this page
A factor appearing on this page means it has been documented in this product category — through EPA / FDA testing, IARC monographs, or regulatory recall records. Whether it presents a meaningful personal risk depends on the specific formulation, dose, and how you're exposed. Click any factor to read what science actually says about it, and where.