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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

360

organizations
Go to organizations
537

datasets
9,291

locations
76.7K

observations
649.8K

datapoints
Browse datapoints by location
3,831

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

27.4K datapoints in 2,686 observations at 131 locations. 24 new observations this week.
Mississippi Water Stewards

Part of the organization: Mississippi State University

42.2K datapoints in 2,801 observations at 121 locations. 18 new observations this week.
Citizen Science Water Monitoring in Unama'ki-Cape Breton

Part of the organization: ACAP Cape Breton

1,410 datapoints in 138 observations at 33 locations. 11 new observations this week.
Brent Catchment Water Quality Working Group

Part of the organization: Thames21

8,580 datapoints in 671 observations at 102 locations. 9 new observations this week.
Sault Ste. Marie Water Rangers Team

Part of the organization: NORDIK Institute

22.5K datapoints in 1,082 observations at 31 locations. 8 new observations this week.
Colquitz Water Quality

Part of the organization: Peninsula Streams Colquitz Watershed Monitoring

764 datapoints in 72 observations at 8 locations. 8 new observations this week.