Great Lakes

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

Man water sampling in river

Quebec Kick-off

Join us for the Quebec DataStream Kick-Off, during the  Forum de science participative sur l’eau.  

Keep ReadingQuebec Kick-off  
water flowing over Niagara Falls --- l'eau qui coule sur les chutes du Niagara

Great Lakes DataStream launch

Help us celebrate the official launch of Great Lakes DataStream at the Great Lakes Public Forum! 

Keep ReadingGreat Lakes DataStream launch  

View all stories

A boat on the water surrounded by mountains

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.


Monitoring Groups


Unique Measurements


Monitoring Sites