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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

347

organizations
Go to organizations
527

datasets
9,154

locations
75.1K

observations
626.7K

datapoints
Browse datapoints by location
3,685

data contributors

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

Mississippi Water Stewards

Part of the organization: Mississippi State University

40.3K datapoints in 2,693 observations at 117 locations. 11 new observations this week.
Lea Guardians

Part of the organization: Thames21

24.7K datapoints in 2,410 observations at 115 locations. 11 new observations this week.
Winter Chloride Watch

Part of the organization: National Great Rivers

44K datapoints in 8,068 observations at 468 locations. 8 new observations this week.
Goulais River Water Quality Monitoring Program

Part of the organization: Lake Superior Watershed Conservancy

881 datapoints in 24 observations at 6 locations. 6 new observations this week.
Millstream Water Quality Monitoring Program

Part of the organization: Friends of Millstream Watershed

1,305 datapoints in 138 observations at 8 locations. 6 new observations this week.
Ravensbourne Catchment Improvement Group's Water Quality Working Group

Part of the organization: Thames21

4,510 datapoints in 477 observations at 34 locations. 5 new observations this week.