​The regional basic register SePe is an information storage maintained by us, which combines the region-specific basic register data that supports the planning, development and research of the Helsinki Metropolitan Area. In addition to the municipal register data, updated every two weeks, SePe provides popula​tion data by the Population Register centre, updated four times a year, as well as business and business location data by Statistics Finland, updated once a year.

The information compiled and harmonised for SePe from various sources enable analysing and processing of such data that would not be possible through one individual data source. The regional basic register is intended mainly as a support tool for planning work of the municipalities in the Helsinki Metropolitan Area and for the data needs of waste management and water services.