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Collect, share, and explore community water science data

We’re a non-profit on a mission to make water science accessible! Our free, open-access platform, testing equipment, and training resources help communities collect, organize, and share water quality data.

Map showing community water quality sites

Browse all of the data!

Explore community-collected water quality data on our public map. Search by location, dataset, or organization, then view sites and trends or download what you need.

Explore the map

Set up your own dataset

You can easily add your organization and dataset, customize your form fields using Water Rangers’ equipment plus your own, and invite your volunteer monitors to contribute. It's free for communities to use.

We've prepared a walkthrough on YouTube to understand the basics.

Built for sharing

We make your water quality data easy to understand with simple visualizations. Want to do more? We follow open data standards so your work can be compared, understood, and acted on. You can download datasets or connect to our open API to pull data into your own projects.

Learn about sharing data

369

organizations
Go to organizations
558

datasets
9,466

locations
79.3K

observations
691.1K

datapoints
Browse datapoints by location
3,954

data contributors

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

Lake Erie Rangers Monthly Monitoring

Part of the organization: Lake Erie Rangers

26.9K datapoints in 1,408 observations at 175 locations. 48 new observations this week.
Big Rideau Lake Water Quality

Part of the organization: Big Rideau Lake Association

7,947 datapoints in 764 observations at 45 locations. 21 new observations this week.
BVAR

Part of the organization: Blackwater Valley Action for our Rivers

2,332 datapoints in 182 observations at 32 locations. 19 new observations this week.
Upper St. Lawrence River Volunteer Monitoring

Part of the organization: River Institute

12.8K datapoints in 1,081 observations at 310 locations. 17 new observations this week.
Suivi Saint-Félix-d'Otis

Part of the organization: Collectif de l'eau

1,000 datapoints in 96 observations at 15 locations. 16 new observations this week.
South Wey Hub

Part of the organization: River Wey Trust

14.5K datapoints in 954 observations at 71 locations. 15 new observations this week.