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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

365

organizations
Go to organizations
547

datasets
9,390

locations
78.2K

observations
672.6K

datapoints
Browse datapoints by location
3,910

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

43.8K datapoints in 2,888 observations at 121 locations. 25 new observations this week.
Lea Guardians

Part of the organization: Thames21

28.2K datapoints in 2,753 observations at 131 locations. 17 new observations this week.
Central Algoma Water Quality Monitoring

Part of the organization: Central Algoma Land Trust

7,067 datapoints in 600 observations at 67 locations. 7 new observations this week.
Ravensbourne Catchment Improvement Group's Water Quality Working Group

Part of the organization: Thames21

5,135 datapoints in 511 observations at 34 locations. 7 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

9,042 datapoints in 694 observations at 103 locations. 6 new observations this week.
Marsh Dykes & Thamesmead Water Quality Group

Part of the organization: Thames21

3,447 datapoints in 356 observations at 39 locations. 6 new observations this week.