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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

384

organizations
Go to organizations
566

datasets
9,560

locations
81K

observations
721.5K

datapoints
Browse datapoints by location
4,055

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

31K datapoints in 2,954 observations at 131 locations. 15 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

10.4K datapoints in 768 observations at 106 locations. 12 new observations this week.
South Craven Becks Chemical Sampling Groups

Part of the organization: Aire Rivers Trust

399 datapoints in 21 observations at 29 locations. 9 new observations this week.
Colquitz Water Quality

Part of the organization: Peninsula Streams Colquitz Watershed Monitoring

1,230 datapoints in 118 observations at 8 locations. 8 new observations this week.
Millstream Water Quality Monitoring Program

Part of the organization: Friends of Millstream Watershed

1,515 datapoints in 162 observations at 8 locations. 6 new observations this week.
Tillingbourne Hub

Part of the organization: River Wey Trust

2,790 datapoints in 268 observations at 30 locations. 6 new observations this week.