Portugal Water and Waste Services Regulation Authority (ERSAR)
ERSAR is the national water supply and sanitation regulatory agency in Portugal. It is responsible for the water supply, wastewater, and solid waste management. Its regulation model is based on the published performance results of its regulated operators. ERSAR publishes annual reports with data obtained from the reports of its operators. These reports cover topics such as water resource characteristics, quality control for human consumption, and financial characteristics of water resources. These reports may be available through their website.