The " Map Ta Phut complex" with 250 large industrial chemicals petrochemical , steel , refinery pollution on various metals. Residents and communities living in the open area experiencing environmental and occupational health . Results of surface water quality Rayong River . Meet quality degradation in water quality since 2549 , with an index score of 100 points , only 37 until the problems with pollution and water shortages begin to accumulate and affect public health. Statistics for cancer patients of all kinds in Muang Rayong than other districts to 5 times .Moreover, also found illegally dumped while many industries. Without penalty , such as coal ash dumped into the sea. Or put acid into the canal to dump the statistics from the year 2546 to the present indicate that. Bangkok has a large amount of hazardous waste is one of the nation for air pollution in 2540 , when hundreds of students MIE thousands Secondary School . Overflow patients because chemical smell of petrochemical plants.