Resumen
The aim of this paper is to analyze two Finnish Joint Regional Authorities for Water Supply?namely the Raisio-Naantali Joint Municipal Authority for Water Supply (established in 1957) and the Tuusula Region Joint Municipal Authority for Water Supply (established in 1967)?for assessing the development of supra-municipal water governance. The above two cases make it possible to analyze and assess water policies in settings where the owners are groups of municipalities. The analysis is based on two separately conducted case studies. The study data consist of several types of materials: Annual reports, local government documents, etc. The conducted interviews were semi-structured with some themes defined beforehand. The studies describe two authorities in the context of historical development and as a part of local development.