The Municipal Water Supply and Sewerage Company of Paros DEYAP is a Legal Entity of Private Law created by the 47/1999 Decision of the Municipal Council of the Municipality of Paros after the approval of the South Aegean Region. It was established and operates in accordance with Law 1069/80 which provides for the establishment of Water Supply Municipal Companies in all Municipalities (Government Gazette of 2010 / 15-11-1999).

All rights, obligations, objects and responsibilities related to the water supply and the sewerage of Paros are automatically conceded by the Municipality of Paros to DEYAP.