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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

389

organizations Help about
Go to organizations
572

datasets Help about
9,617

locations Help about
82.1K

observations Help about
740K

datapoints Help about
Browse datapoints by location
4,132

data contributors Help about

Popular testing spots

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Recently sampled and photographed

Most active datasets

Active this week

Winter Chloride Watch

Part of the organization: The Conservation Foundation

44.5K datapoints in 8,157 observations at 487 locations. 30 new observations this week.
Lea Guardians

Part of the organization: Thames21

31.8K datapoints in 3,022 observations at 122 locations. 11 new observations this week.
Ravensbourne Catchment Improvement Group's Water Quality Working Group

Part of the organization: Thames21

6,283 datapoints in 573 observations at 38 locations. 8 new observations this week.
Upper St. Lawrence River Volunteer Monitoring

Part of the organization: River Institute

14.3K datapoints in 1,181 observations at 321 locations. 6 new observations this week.
National Rivers Survey - Axe Rivers

Part of the organization: Triple Axe Partnership

3,419 datapoints in 114 observations at 30 locations. 6 new observations this week.
Tillingbourne Hub

Part of the organization: River Wey Trust

2,984 datapoints in 289 observations at 31 locations. 6 new observations this week.