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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

382

organizations
Go to organizations
563

datasets
9,541

locations
80.8K

observations
718.1K

datapoints
Browse datapoints by location
4,035

data contributors

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

River Worth Water Blitz

Part of the organization: Aire Rivers Trust

1,360 datapoints in 63 observations at 23 locations. 16 new observations this week.
Lea Guardians

Part of the organization: Thames21

30.7K datapoints in 2,941 observations at 131 locations. 15 new observations this week.
Sault Ste. Marie Water Rangers Team

Part of the organization: NORDIK Institute

26.7K datapoints in 1,262 observations at 32 locations. 13 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

10.3K datapoints in 757 observations at 104 locations. 12 new observations this week.
Pinn Frays Water Quality Dataset

Part of the organization: Pinn & Frays Water Quality

648 datapoints in 40 observations at 14 locations. 11 new observations this week.
Missanabie Cree First Nation - Dog Lake Head Waters Monitoring Program

Part of the organization: NORDIK Institute

1,880 datapoints in 146 observations at 34 locations. 10 new observations this week.