French website Que Qhoisir has created a Google Map showing the The Quality of French Tap Water. The map is based on the results of a water analysis of 36,568 communes by the Ministry of Health.
Users of the map can search the map by address or postcode. The map will then display the tap water quality results recorded near that location. Each result give details about the quality of the water under a number of headings, including pesticides, selenium, bacteria, radioactivity and aluminum.