Living among the cobbles, boulders, sand, leaves, and other materials on our rivers’ bottoms is an incredibly diverse world of insects, snails, clams, worms, mites, crayfish and other benthic macroinvertebrates that play an important role in the maintenance of healthy streams and watersheds. When something goes awry with water quality or river habitat, these communities of tiny animals are almost always effected. Examining this life in water both opens up a diverse new world that bustles with activity and also provides great insight into the condition of our rivers and streams.   


Welcome to DRWA’s benthic macroinvertebrate (BMI) monitoring program’s web page. Here you will find information about macroinvertebrates, their use as indicators of the health of our rivers and streams, and the particulars of DRWA’s macroinvertebrate monitoring program. Among these pages is information about our program, the protocols we use, our Quality Assurance Project Plan, reports on our work, and a new interactive map of the watershed that depicts all of our monitoring sites and allows the user to rapidly retrieve and view information and data from each monitoring site.

We hope these pages are a useful source for watershed residents, land owners, and resource managers who are interested in better understanding the conditions of the running waters of the Deerfield River watershed. We also hope that it may inspire others to develop these programs in their own watershed.
Click to go to biomonitoring map pageclick to open map page

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