A cross-sectional study reveals significant health risks from PFAS in drinking water across counties in Northwest China, suggesting urgent monitoring needs.
This study investigated per- and polyfluoroalkyl substances (PFASs) in drinking water from a watershed in Northwest China, assessed their detection status across different counties and cities, and evaluated associated health risks. Significant differences in detection rates were observed (P < 0.001). In downstream County C and City E, hazard quotient (HQ) values exceeded 1 for most demographic groups (except males aged 12–16), with HQ > 2 in males over 60. Perfluorobutanoic acid levels differed significantly by age (P < 0.001), while perfluoropentanoic acid varied by age and gender (P < 0.001). Downstream County C and City E showed relatively high health risks, whereas upstream County A and B posed negligible risks.
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Yang et al. (2026) studied this question.
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