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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

358

organizations
Go to organizations
533

datasets
9,279

locations
76.5K

observations
647.6K

datapoints
Browse datapoints by location
3,818

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

41.9K datapoints in 2,784 observations at 121 locations. 20 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

8,507 datapoints in 667 observations at 101 locations. 12 new observations this week.
Lea Guardians

Part of the organization: Thames21

27.1K datapoints in 2,665 observations at 131 locations. 11 new observations this week.
River Worth Water Blitz

Part of the organization: Aire Rivers Trust

293 datapoints in 13 observations at 23 locations. 9 new observations this week.
Mississippi Lakes Association

Part of the organization: Mississippi Lakes Association

9,164 datapoints in 777 observations at 70 locations. 7 new observations this week.
Millstream Water Quality Monitoring Program

Part of the organization: Friends of Millstream Watershed

1,365 datapoints in 144 observations at 8 locations. 6 new observations this week.