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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

386

organizations
Go to organizations
568

datasets
9,614

locations
81.8K

observations
734.4K

datapoints
Browse datapoints by location
4,094

data contributors

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

Lea Guardians

Part of the organization: Thames21

31.6K datapoints in 3,007 observations at 131 locations. 16 new observations this week.
Roundhay Freshwater Watch

Part of the organization: Roundhay Environmental Action Project and Friends of Roundhay Park

6,204 datapoints in 298 observations at 16 locations. 14 new observations this week.
Lake Erie Rangers Monthly Monitoring

Part of the organization: Lake Erie Rangers

31.2K datapoints in 1,586 observations at 186 locations. 13 new observations this week.
Missanabie Cree First Nation - Dog Lake Head Waters Monitoring Program

Part of the organization: NORDIK Institute

2,034 datapoints in 157 observations at 34 locations. 11 new observations this week.
Upper St. Lawrence River Volunteer Monitoring

Part of the organization: River Institute

14K datapoints in 1,163 observations at 320 locations. 10 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

10.6K datapoints in 779 observations at 106 locations. 10 new observations this week.