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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

377

organizations
Go to organizations
558

datasets
9,514

locations
80.3K

observations
708.5K

datapoints
Browse datapoints by location
4,010

data contributors

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

Lake Erie Rangers Monthly Monitoring

Part of the organization: Lake Erie Rangers

28.3K datapoints in 1,462 observations at 176 locations. 28 new observations this week.
BVAR

Part of the organization: Blackwater Valley Action for our Rivers

2,651 datapoints in 206 observations at 33 locations. 19 new observations this week.
Lea Guardians

Part of the organization: Thames21

30.1K datapoints in 2,897 observations at 131 locations. 17 new observations this week.
OART River Rangers

Part of the organization: Ouse & Adur Rivers Trust

4,011 datapoints in 220 observations at 39 locations. 13 new observations this week.
Upper St. Lawrence River Volunteer Monitoring

Part of the organization: River Institute

13.5K datapoints in 1,138 observations at 314 locations. 12 new observations this week.
Roundhay Freshwater Watch

Part of the organization: Roundhay Environmental Action Project and Friends of Roundhay Park

5,810 datapoints in 280 observations at 16 locations. 12 new observations this week.