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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

366

organizations
Go to organizations
550

datasets
9,419

locations
78.5K

observations
677.3K

datapoints
Browse datapoints by location
3,925

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

44.1K datapoints in 2,906 observations at 121 locations. 17 new observations this week.
Lea Guardians

Part of the organization: Thames21

28.6K datapoints in 2,774 observations at 131 locations. 17 new observations this week.
Citizen Science Water Monitoring in Unama'ki-Cape Breton

Part of the organization: ACAP Cape Breton

1,737 datapoints in 171 observations at 33 locations. 11 new observations this week.
Ribble Catchment Data

Part of the organization: Ribble Fisheries

1,583 datapoints in 221 observations at 94 locations. 10 new observations this week.
Colquitz Water Quality

Part of the organization: Peninsula Streams Colquitz Watershed Monitoring

914 datapoints in 87 observations at 8 locations. 7 new observations this week.
Millstream Water Quality Monitoring Program

Part of the organization: Friends of Millstream Watershed

1,413 datapoints in 150 observations at 8 locations. 6 new observations this week.