Implementation of waste water drainage network in Coutada Velha The operation consists of an investment to implement the drainage network of domestic wastewater in Coutada Velha and its routing to the existing wastewater treatment plant in Vale Tripeiro. The aim is to ensure that the population has access to a resilient and quality waste water management service, as well as to improve the quality of waste water that is discarded and reintegrated into the environment, with positive effects on the quality of water bodies.share on FacebookTwitterLinkedinEmailreport an issue