The purpose of the contract is to purchase cleaning and sanitizing services for Águas do Douro e Paiva, S.A. and Simdouro - Sanitation of Grande Porto, S.A. and supply of consumables.

Limited competition due to prior qualification for the purchase of cleaning and sanitization services of Águas do Douro e Paiva, S.A. and Simdouro — Sanitation do Grande Porto, S.A. and supplies of consumables.