Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water.
New to EnviroDIY? Start here

Monitor With Mayfly

Our EnviroDIY Mayfly Data Logger is user programmable and Arduino IDE compatible.

Program Your Mayfly

Get sketches, libraries, and documentation to help you program your Mayfly.

Stream Your Data Online

Share your data and access data from around the world on Monitor My Watershed®.

Get Answers on the Forum

Have a question about DIY environmental monitoring? Share it with EnviroDIY members.

All content on EnviroDIY is licensed as Creative Commons Attribution-ShareAlike 4.0. Hardware designs on EnviroDIY are released under the CERN Open Hardware License 1.2. Alternative licenses are available. Learn more

Learn Do-It-Yourself Electronics for Environmental Monitoring

August 13 and 14 at Stroud Water Research Center in Avondale, Pa.

Learn how to assemble, program, and deploy a water monitoring station, with the understanding that the DIY journey has just begun! See workshop details

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Did you know you can buy the Mayfly Data Logger and other EnviroDIY products in our Shop? You’ll also find products there that aren’t available on Amazon.com.