One contract covers all parishes of Viana do Castelo at €3.14 million, while the Ponte de Lima tender is valued at €2.1 million, both excluding VAT and with three-year execution periods.

Bids must be submitted by noon on 29 January and remain valid for 90 days, with AdAM, operating since 2020, majority-owned by Águas de Portugal and the remaining stake held by seven Alto Minho councils.