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
A collaborative approach to tracking water quality across Haliburton lakes
In 2022, the U-Links Centre for Community-Based Research created the “Testing the Waters” initiative through their Woodlands & Waterways EcoWatch (WWEW) program.
DataStream achieves CoreTrustSeal certification
DataStream is proud to announce that it has achieved CoreTrustSeal certification as a Trustworthy Digital Repository (TDR).
From shoreline to decision table: How community science is transforming Great Lakes protection
55 representatives from 20 organizations attended the Canada Water Agency's Community-based Science Roundtable, a virtual gathering in December 2025.
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.
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Monitoring Groups
5.6M
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Unique Measurements
4.8K
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Monitoring Sites
