With regard to pollution control in Thailand, the Office of Environmental Policy and
Planning, Ministry of Natural Resource and Environment (MNRE) is mandated to review and approve the environmental impact assessment (EIA) of 22 hazardous industries. This activity can be considered as primary prevention of industrial pollution. Meanwhile, once pollution is suspected, the Department of Pollution Control(DPC) is called for investigation and control activity. Generally, the DPC staffs conduct their work independently and Ministry of Public Health (MOPH) is consulted for diagnosis and treatment of the diseases or clinical symptoms presented. In addition, after a certain period of time, follow up of environmental contamination and adverse health effects are both discontinued.