Paracetamol (Acetaminophen)
Cities measured
87
Detected in
87 / 87
Highest
0.31 μg/L — Karachi
Overview
Paracetamol is the world's most consumed analgesic and antipyretic. It is extensively excreted as metabolites into wastewater. It degrades faster than many pharmaceuticals but is consistently detected in surface water and at trace levels in some drinking water.
Health Relevance
At environmental trace concentrations, paracetamol poses no direct health risk via drinking water. Its primary concern is aquatic invertebrate toxicity.
Regulatory Limits
Drinking Water Directive 2020/2184
No EU regulatory limit.
Controversy & Contested Science
A 2021 consensus statement by 91 scientists called for precautionary paracetamol use during pregnancy, citing studies associating prenatal exposure with ADHD and autism spectrum disorder. The proposed mechanism — paracetamol inhibits cyclo-oxygenase enzymes involved in prostaglandin signalling critical to fetal development — is plausible. Regulatory bodies (EMA, FDA) say evidence is insufficient for action. This debate illustrates how a drug with decades of apparent safety can face unexpected developmental concerns as epidemiological cohort studies mature.