Vapi tops the list of critically polluted areas in the country as per the Comprehensive Environmental Pollution Index of the Central Pollution Control Board. According to a report submitted by the Gujarat Pollution Control Board to the Central board, the estate houses 759 industries, of which 70 per cent manufacture chemicals such as dyes and dye intermediates, pigments, pesticides, fine chemicals and pharmaceuticals. The report also includes an action plan to curb pollution.