Municipal residential drinking water systems supply the homes of more than 80 per cent of Ontarians. Others obtain drinking water from either non-municipal year-round residential systems, seasonal residential systems or small private systems serving five homes or fewer (such as private wells).
Information on the results of each system may be found in the annual report prepared by municipalities to fulfil the public reporting requirements of O.Reg. 170/03.
For more information about your municipality's drinking water, click your region on the map or select it from the list.
Learn more about adverse water quality incidents.
