Explore Monitoring Results
One-click visualizations make monitoring results easier to understand.
Great Lakes
DataStream
An open access hub for sharing water data
Our mission is to promote knowledge sharing and collaboration so our waters remain healthy for generations to come
Stories and Announcements
How salty is that urban creek?
For the past five years, Ottawa Riverkeeper volunteers have been heading out to collect water samples during nasty weather, measuring the impact of road salt on urban creeks.
Meet Our Team: Jessica Lagroix
As part of our ongoing staff feature series, we are thrilled to profile one of DataStream’s Data Specialists, Jessica Lagroix!
The 2025 Watershed Reports are here! This is what we learned
Water Rangers recently published the highly anticipated 2025 Watershed Reports. DataStream was proud to contribute data to these vital reports. Below are some of the DataStream team’s takeaways.
Better Data Means Better Decisions
Communities can drive the data-to-policy cycle. Great Lakes DataStream is designed to support this.
Monitoring Groups
Communities are connected to their waters and best-placed to see changes as they happen.
Open Data
DataStream provides a place to store, share, and compare water monitoring data across watersheds.
Interpretation & Knowledge
Open data advances scientific knowledge, supports collaboration, and fuels innovation.
Policy & Action
Knowledge can be translated into action to protect the health of watersheds on which we all depend.
Great Lakes DataStream at a Glance
DataStream brings water monitoring information together so it’s open, accessible and usable.
82
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Monitoring Groups
5.2M
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Unique Measurements
26K
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Monitoring Sites
