Great Lakes
DataStream

An open access hub for sharing water data

Our mission is to promote knowledge sharing and advance collaborative water stewardship

Explore Data

Explore Monitoring Results

One-click visualizations make monitoring results easier to understand.

Explore Data

Animated demo of DataStream

Stories and Announcements

Lake with blue sky --- lac avec ciel bleu

Climate change is accelerating. And smart responses depend on good data.

In watersheds across Canada, temperatures are rising, rainfall patterns are shifting, and storms are hitting harder and more frequently. We’re seeing more droughts, floods, runoff and algal blooms. And the pace of climate change just keeps accelerating. 

Keep ReadingClimate change is accelerating. And smart responses depend on good data.  
Map of great lakes

Five ways open data helps protect freshwater

It’s Open Data Day, a chance to celebrate open access data from all over the world!

Keep ReadingFive ways open data helps protect freshwater  

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Better Data Means Better Decisions

Communities can drive the data-to-policy cycle. Great Lakes DataStream is designed to support this.

About DataStream

Monitoring Groups

Monitoring Groups

Communities are connected to their waters and best-placed to see changes as they happen.

Open Data

Open Data

DataStream provides a place to store, share, and compare water monitoring data across watersheds.

Interpretation & Knowledge

Interpretation & Knowledge

Open data advances scientific knowledge, supports collaboration, and fuels innovation.

Policy & Action

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

8,665,892

Unique Measurements

21,924

Monitoring Sites