# Monitoring Locations EnviroData groups all data and information related to a single spot into **monitoring locations** (also called stations). Monitoring locations are categorized based on their data's sample media (e.g., drinking water vs process water) and whether the data type is discrete or continuous. A monitoring locations is considered **active** when it's linked with an existing data source. **Active monitoring locations** will automatically become populated with data that's imported from its linked data source. You can manage a monitoring location's data source link on the *Manage > Monitoring Locations* page. Multiple data sources can be saved to the same monitoring location, with each subsequent data source after the primary one listed as *Monitoring Location Aliases*. A list of all active monitoring locations with linked data sources is presented on the left sidebar under its appropriate category. You can change a monitoring location's category by navigating to the Monitoring Location Summary page, clicking *EDIT LOCATION* and editing the *Station Category* field. The *monitoring location summary* page also provides a list of aliases. ## Related Reading - [Tutorial 1 - Monitoring Locations](../tutorials/tutorial_1) - [EnviroData Cookbook - Monitoring Location Task Recipes](../how_to/monitoring_locations_recipes) - [EnviroData R - get_aquarius_location_list()](http://docs.envirodata.io/edr/reference/get_aquarius_location_list.html) - [EnviroData R - get_aquarius_location_details()](http://docs.envirodata.io/edr/reference/get_aquarius_location_details.html) - [EnviroData R - get_wq_location_details()](http://docs.envirodata.io/edr/reference/get_wq_location_details.html)