Nairobi- 17 June 2024- A comprehensive global study of POPs, health-endangering chemicals that stay in the environment over decades and longer, confirms they persist in human milk, air, water, soil, food and various ecosystems. The study, implemented by the UN Environment Programme (UNEP) and funded by the Global Environment Facility (GEF), stresses the importance of POPs monitoring, caution in introducing alternatives, and addressing gaps in awareness and regulation.
The study was conducted across 42 countries in regions where data on POPs is limited, including Africa, Asia, Latin America and the Caribbean, and the Pacific Islands to monitor 30 POPs listed under the Stockholm Convention as of 2021. Samples were collected between 2016 and 2019.
The data is published as governments gather this week in Geneva for an ad hoc open-ended working group on the establishment of a science-policy panel on chemicals, waste and pollution prevention.
“POPs remain omnipresent, despite efforts to reduce their use and production,” said Andrea Hinwood, UNEP’s Chief Scientist. “Monitoring the concentrations of POPs in the environment and in our own bodies is vital, especially in low- and middle-income countries, to support their assessment of contamination, emissions, and exposure to POPs for informed decision making.”
The list of 30 POPs monitored in the study includes pesticides and industrial chemicals, as well as unintentionally released POPs that are by-products of industrial processes and from incomplete combustion (e.g., open burning of waste). They were found in every one of more than 900 collected samples, with over 50,000 data points generated on POPs in air, water, human milk, soil, beef, milk, milk powder, butter, mutton, pork, chicken, eggs, fish and shellfish, oil, and other items.
Data shows a global decline in the levels of 12 POPs initially listed in the 2004 Stockholm Convention; the report credits this trend to regulatory actions taken since. The use of DDT, once deployed in agriculture and now highly restricted, has decreased in human milk samples by over 70 per cent since 2004 on global average. Nevertheless, DDT remains the most prevalent POP in human milk, particularly in countries where it was intensively used.
“POPs monitoring is essential for evaluating the real-world impact of global actions,” said Rolph Payet, Executive Secretary of the Basel, Rotterdam and Stockholm Conventions. “The scientific findings not only illustrate the achievements of collective global efforts, but also highlight the urgent need of intensifying global initiatives to protect the health of humans and the environment.”
Newly listed POPs are increasingly difficult to monitor, even by the world’s top laboratories. While data collection is improving, with more labs in low-income countries participating in POPs monitoring, including in the UNEP global interlaboratory assessments, the quality of POPs analysis must continue to improve.
“Governments need not be pulled into a toxic game of hide and seek, where one regulated POP is replaced with a new one. This troubling pattern means these substances are still present in products we use, eat, wear, as well as in our air and water,” said Jacqueline Alvarez, Chief of the Chemicals and Health Branch of UNEP. “This highlights the risk of regrettable substitutions of banned POPs and the need to prioritize sustainability in industrial product design and consumer behaviour.”
UNEP will continue supporting governments and work with industries to address POPs, identify areas in need of immediate attention, track the progress of pollution reduction efforts, and take action to prevent further contamination.
