The ESI Scheme was implemented in the cities of Kolkata and Howrah of West Bengal Region on 14th August 1955. Later the scheme  extended to other centers in the state in a phased manner and the scheme is now working in 17centers spread over in 12districts of the state. The list of centers the ESI Scheme in West Bengal is in force with the date of implementation.

Presently the scheme covers 26,214 industries and establishments with 10 lakhs employees of such factories/establishments and about 39 lakhs beneficiaries including family members getting ESI benefits in the state.