of revenues due to daily commuters. It is the only city connecting Daman district with Dadra and Nagar Haveli district. A coast guard airport is running in Daman where private charters can operate with prior permissions. It will also be one of the stations in the Mumbai–Ahmedabad High Speed Rail Corridor, otherwise known as the 'Bullet train project'. Economy Proximity to the larger cities of Mumbai, Surat, Vadodara, and Ahmedabad, coupled with liberal Government policy, has helped Vapi and surrounding areas attain their current level of industrial activity. The "Vapi Industrial Estate" was started by GIDC in 1967, and has spread to 11.4 square kilometres (4.4 sq mi) and houses over 1,400 industries, the majority of which are small-scale units (SSIs). Chemical industries such as Aarti, Supreet Chemicals, and textile giants such as Alok industries, Welspun Terry Towels, Century Textiles, GHCL and Raymonds Limited have strong presences in Vapi and nearby areas. Bayer Vapi Pvt Ltd, United Phosphorus Ltd., Supreet Chemicals Pvt Ltd., Sarna Chemicals, Sangir Plastics, Kampun Polymers, Lathia Rubbers, Arti Industries Ltd., Themis Industries and Hubergroup India Pvt Ltd (formerly Micro Inks Limited), operate manufacturing plants in Vapi. Today, about 70% of the total industries in the township are chemical plants, mainly for chemical distillation and the production of pesticides, dyes, dye intermediaries and paints. Other major industries include paper, packaging, pharmaceuticals, plastics, rubber, textiles, wood, computer hardware and software, engineering workshops, glass, and food products. Another striking feature of Vapi is the Common Effluent Treatment Plant (or CETP). This is the largest of its kind in Asia and one of India's biggest effluent treatment plants in terms of capacity, treating the pollutants from these industries before the effluent is released into the river. The CETP is run by Vapi Waste and Effluent Management Company, promoted by the Vapi Industries Association. Vapi has the maximum number of Kraft paper & duplex board paper mills in India. The best quality paper producers are located in Vapi and to have more than 20 kraft paper mills within a distance of 20 km. Therefore, Vapi is also known as "paper hub". Demography As per census of 2011 done by the Indian government, population of Vapi in 2011 was 163,630, of which male and female are 94,105 and 69,525 respectively. The average literacy rate is 89%. Gujarati and Hindi are the most common languages, although due to its need of workers in