Welcome to the Grand River Information Network (GRIN), your gateway to exploring and retrieving information about the Grand River watershed. This portal directs you to various interactive viewing and data download tools to help you quickly find the information you need.


Use our interactive mapping applications to create your own maps of areas within the Grand River watershed. Ideal for creating maps of your property, study area, or for reports and school projects.

Maps »

GIS Data

The GRCA maintains a collection of data layers for its geographic information system (GIS) and other operational systems. You can download the GRCA's GIS data (vector and raster) using our simple download tools.

GIS Data »

Monitoring Data

Want access to the near real-time monitoring data provided in our charts and reports in our River Data Site? Data from daily and hourly monitoring stations are available for download including river levels, flows, and weather conditions.

Monitoring Data »