Our members organize and participate in field work like:
Trees stabilize banks, increase percolation, and shade the water, creating a cooler environment for aquatic critters. These areas need some care while trees are young. And sometimes we need to free some smaller trees from enshrouding vines.
Stream health is judged in several ways:
A habitat assessment (is this a nice place for critters to live?)
A macroinvertebrate survey (who are the neighbors?)
Stream flow (depth profile and velocity)
Chemical measures that reflect substrate and other exposures like alkalinity and pH
Dissolved oxygen (aquatic creatures need this!)
Indicators of pollutants, for example by turbidity, salinity, and direct measurement of nitrates and phosphates
Have a look at our summary of all our testing from Sep 2022 through Dec2025
And here's a running summary of the stream chemistry testing
All kinds of junk gets stuck in our waterways and riparian areas. Bicycles, wheelbarrows, street signs, plastics, lost tree tubes, and more. Volunteering for a cleanup is a great way to keep our watershed clean, safe, and lookin' good.