Vapi ( IAST: vāpī,), is a city and municipality in Valsad District in the state of Gujarat. It is situated on the banks of the Damanganga River and is the largest city in the Valsad district and also the second largest city after Surat in South Gujarat.It can be called the most developed city in Gujarat followed by Ahemdabad, Surat, Vadodara and Rajkot.
Around 28 km south of the district headquarters in the city of Valsad, it is surrounded by the Union Territories of Daman to the west and Dadra and Nagar Haveli to the east. Economic and industrial growth in recent decades has blurred the physical boundaries, and a small stretch of roughly 21 km of Daman-Vapi- Silvassa has almost become a single urban area. The town originally belonged to the community of Koli Patel (Local Farmers),Desai (Anavil Bramhins), Jains and other tribal castes later migrated to the city. It is the largest industrial area in Asia in terms of small-scale industries, dominated by the chemical industry. It has been ranked 2 in the year 2008 among the most polluted places in the world, mainly due to its poor air and water quality caused by nearby industrial sites. People who have been living in the town have a lot of complaints about their health due to the pollution emissions happening almost every night from chemical factories