Morphine
Cities measured
87
Detected in
84 / 87
Highest
0.015 μg/L — Karachi
Overview
Morphine is the principal analgesic alkaloid of opium, widely used medically. In wastewater it originates from both medical use (hospitals, palliative care) and heroin metabolism. It is consistently detected in European wastewater at low ng/L concentrations.
Health Relevance
At environmental concentrations, no pharmacological effect. Behavioural effects in zebrafish at μg/L concentrations.
Regulatory Limits
Drinking Water Directive 2020/2184
No regulatory limit.
Controversy & Contested Science
US wastewater epidemiology documented the geographic expansion of the opioid epidemic from Appalachia before traditional surveillance detected it — demonstrating WBE's potential for early-warning public health intelligence. A similar approach is now monitoring emerging synthetic opioids (nitazenes, new fentanyl analogues) in European cities. The tension between WBE surveillance capabilities and regulatory response capacity — being able to detect a crisis faster than policy can adapt — is a recurring theme in public health.