Already a Water Ranger? Login

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

381

organizations
Go to organizations
563

datasets
9,534

locations
80.7K

observations
716.4K

datapoints
Browse datapoints by location
4,032

data contributors

Popular testing spots

›

Recently sampled and photographed

Most active datasets

Active this week

Lea Guardians

Part of the organization: Thames21

30.6K datapoints in 2,935 observations at 131 locations. 15 new observations this week.
River Worth Water Blitz

Part of the organization: Aire Rivers Trust

1,287 datapoints in 60 observations at 23 locations. 13 new observations this week.
Sault Ste. Marie Water Rangers Team

Part of the organization: NORDIK Institute

26.5K datapoints in 1,256 observations at 32 locations. 10 new observations this week.
Winter Chloride Watch

Part of the organization: The Conservation Foundation

44.3K datapoints in 8,119 observations at 467 locations. 9 new observations this week.
National Rivers Survey - Axe Rivers

Part of the organization: Triple Axe Partnership

2,795 datapoints in 93 observations at 28 locations. 8 new observations this week.
Pinn Frays Water Quality Dataset

Part of the organization: Pinn & Frays Water Quality

594 datapoints in 37 observations at 14 locations. 8 new observations this week.