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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

372

organizations
Go to organizations
558

datasets
9,483

locations
79.6K

observations
697.7K

datapoints
Browse datapoints by location
3,981

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

29.5K datapoints in 2,844 observations at 131 locations. 18 new observations this week.
River Worth Water Blitz

Part of the organization: Aire Rivers Trust

959 datapoints in 44 observations at 23 locations. 14 new observations this week.
Ravensbourne Catchment Improvement Group's Water Quality Working Group

Part of the organization: Thames21

5,607 datapoints in 536 observations at 38 locations. 11 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

9,556 datapoints in 723 observations at 104 locations. 10 new observations this week.
Mississippi Lakes Association

Part of the organization: Mississippi Lakes Association

10.3K datapoints in 859 observations at 72 locations. 9 new observations this week.
Pinn Frays Water Quality Dataset

Part of the organization: Pinn & Frays Water Quality

352 datapoints in 22 observations at 14 locations. 8 new observations this week.