Key Summary
- Although drug usage is present throughout the year, it spikes on special occassions.
- Cocaine is ranked one while ketamine is ranked second in the highest usage across England.
- The researchers found the presence of the drugs in the human excreta found in wastewater.
Imperial College London’s School of Public Health conducted a year-long examination of England’s wastewater to understand the surge in the usage of recreational drugs, especially during major sporting events, music shows, heatwaves, and bank holidays.
During the study, researchers examined more than 1,700 water samples from 15 wastewater treatment sites across England.
They found that drug usage was there throughout the year, but it spiked during particular days.
According to the findings, England faced massive drug use in 2022, with the chemical signatures for nearly 20 substances discovered and studied via liquid chromatography-mass spectrometry.
Drugs like cocaine, heroin, ketamine, amphetamine, MDMA, etc., in connection with England’s FIFA World Cup games, summer heatwaves, music events and bank holidays such as Queen’s Jubilee celebrations, were identified.
Drugs consumed scatter in the body and the study utilised those particles found in the sewage from human excreta to identify the substances.
Cocaine had the highest presence, followed by heroin, ketamine, amphetamine, MDMA, and methamphetamine.
The study also draws attention to the correlation of substances such as cocaine and ketamine, cocaine and alcohol, etc.
On the other hand, ketamine showed strong presence in several English sites than other European sites, when compared with the European drug surveillance data.
Along with the consumption trends, the study also aims to focus on drug-related overdose deaths, and seasonal weather changes.
However, it states that the number of users seems to decrease with major drug seizures by the police.
With a massive seizure of 3.7 tonnes of cocaine in Southampton, the widespread use of it has dropped since March.
“Each year, the UK is seeing increases in drug‑related deaths and in the number of people using drugs frequently. These patterns have serious consequences for health, crime and society as a whole,” Professor Leon Barron from the Environmental Research Group at Imperial College London, principal investigator of the study commented.
“By measuring the substances that ultimately end up in wastewater, we can make more informed decisions in near real time on how, where and when to implement harm reduction initiatives as well as direct and measure the impact of law enforcement efforts.”
“The impact of drug seizures on cocaine consumption in major urban areas was a new and very valuable benefit of wastewater analysis. It was clear that these tonne-sized seizures could have impacted cities that were hundreds of miles apart,” he added.
However, the researchers do not recommend using the data to calculate national average consumption as this study only focused on urban population (21 per cent of the total population) and has no complete representation.
The research published in the journal Addiction was also supported by the Home Office, the Defence Science and Technology Laboratory and the National Crime Agency, and was commissioned via Imperial Projects (IPROJ).
Professor Barron was part-funded by the National Institute for Health and Care Research (NIHR) under the Health Protection Research Units in Environmental Exposures and Health, and Chemical and Radiation Threats and Hazards, both partnerships between the UK Health Security Agency and Imperial College London.
