Using reclaimed water in dual pressurized water distribution networks. Cost analysis

[Display omitted] •Water reuse is an alternative to reduce human pressure to the environment. The predictions aim to a 25% increase of water use for the next 30 years.•A method to calculate the viability of reusing treated wastewater has been proposed considering investments and saving expected.•Environmental costs are considered in our study. Their consideration reduces the payback period of these installations.•We plan a method and we apply it in a village close to Alicante city.•The treatment plant and the dual pressurized network are a feasible alternative if we consider the whole costs of water. Reclaimed water can be used for non-potable applications to reduce water consumption from freshwater sources. In several regions, the full potential of reusing treated wastewater has not yet been exploited. Establishing a circular economy could promote the acceptance of reclaimed water as an alternative water supply source. This study investigates the feasibility of constructing a treatment plant to supply reclaimed water for non-potable applications using a dual water distribution network, from an engineering cost standpoint.