Particulate matter (PM) is an issue of public health concern around the world. Over the last few years there has been increasingly robust evidence of severe health effects associated with ambient PM, which can penetrate the lungs and increase the likelihood of disease and premature death.
The increasing body of scientific evidence on the adverse health effects of PM have led different jurisdictions to carry out their own reviews of the problem. The United States, the European Union and Australia have all recently reviewed, or are in the process of reviewing, their PM standards. They have all chosen to develop PM2.5 standards because it was felt that existing PM10 standards did not adequately protect public health.
This report compares international particulate matter standards with a view at the Pearl River Delta region.