Funding Agency: World Health Organization (WHO) under the Water, Sanitation, Hygiene and Health Unit within the Environment, Climate Change, One Health, and Migration Department

Objective

The objective of this project is to evaluate the occurrence of PFAS throughout the water cycle to better understand their presence in drinking water. This deeper analysis will support the development of health-based values specific to drinking-water exposure and help identify regional variations in PFAS contamination.

Methodology

The project systematically collects, reviews, and evaluates PFAS occurrence data using an updated landscape review protocol that incorporates study quality, analytical methods, detection limits, and water treatment considerations. The updated and expanded database, drawn from global sources, enables a detailed assessment of PFAS concentrations across regions and water system types, forming the evidence base for future WHO guideline development.