Ambient Groundwater Geochemistry

Ambient Groundwater Geochemistry

The GeologyOntario (includes OGSEarth) web pages will be updated with a new look in the coming weeks, starting at the end of September 2021.
The updated design improves the user experience by simplifying the layout, making the pages more mobile compatible, and aligning with other Ministry web pages.
Please contact Alphons Evers ( if you encounter any issues after the change or have any questions.

During this update, this page will be removed. Please update your bookmark to the following: Ambient Groundwater Geochemistry.

Ambient Groundwater Geochemistry contains detailed inorganic chemistry data collected from over 2300 water samples from southern Ontario.

Data includes: well information, dissolved gases, major ions, trace elements, field measurement of temperature, PH, redox potential and electrical conductivity.

Download the Ambient Groundwater Geochemistry data in GIS format.