site map

Our work is divided into six program areas

To learn more about a program, move your cursor over the appropriate image above. For a more complete description of a program and its related projects, click the coressponding image.
Q: Why are insects crawling over this page?
A: These benthic macroinvertebrates (bottom-dwelling stream bugs big enough to see without a microscope) tell us a great deal about water quality.

Sierra Streams Institute is a watershed monitoring, research, and restoration group based in Nevada City, California, in the Sierra Nevada foothills. Our mission is to link water, science and people for the benefit of human and environmental health. Founded in 1995 as Friends of Deer Creek, SSI has grown to become an important voice in the regional scientific community—but we are still proud to call Deer Creek our home watershed.


Our featured publication:

The Bug Book
Bug Book

A Guide to the Identification of Common Aquatic Benthic Macroinvertebrate Families of California and Western North America

The newest edition of our noted identification guide. Learn more and buy the book.

News & Notices
  • California Naturalist certification
    SSI’s Spring 2017 session of the California Naturalist Program will run March 8–May 17. Past participants have called it “fulfilling,” “life-expanding,” “awesome,” and “transformational.” More info here.
  • Watch Rush for Gold
    This short film, an official selection of the 2015 Wild and Scenic Film Festival, tells the story of the Gold Rush's impact on local Native people, Chinese immigrants, and the Deer Creek watershed. You can watch the film and the interviews it draws from here.
Donate Now
Learn more about our current projects
Sign up for our email newsletter >>
Get your hands wet!
We have many opportunities for participating in citizen science and restoration projects. Click one of the buttons to the right or visit our Get Involved page.
Volunteer Amphibian monitoring portal