Water Quality Displayed with Google Maps

APEL Carte Interactive uses Google Maps to visualise water quality data in the watershed of the St. Charles River, Quebec.

Water quality is displayed on the map using different colors (blue for good, red for bad). If you click on a map marker two graphs load in the map sidebar illustrating annual and monthly trends at that location. A menu at the top of the map allows users to also view the results of different water quality readings, such as fecal coliform, phosphorous etc.