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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

373

organizations
Go to organizations
558

datasets
9,487

locations
79.7K

observations
699.8K

datapoints
Browse datapoints by location
3,989

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

29.7K datapoints in 2,855 observations at 131 locations. 23 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

5,663 datapoints in 539 observations at 38 locations. 10 new observations this week.
Mississippi Lakes Association

Part of the organization: Mississippi Lakes Association

10.4K datapoints in 863 observations at 72 locations. 10 new observations this week.
Sault Ste. Marie Water Rangers Team

Part of the organization: NORDIK Institute

25.4K datapoints in 1,207 observations at 32 locations. 8 new observations this week.
Colquitz Water Quality

Part of the organization: Peninsula Streams Colquitz Watershed Monitoring

1,072 datapoints in 102 observations at 8 locations. 8 new observations this week.