Cobb County Government
Watershed Stewardship Program
Connecting Community to Local Ecology 

Biological Monitoring

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Through a partnership with Georgia Adopt-A-Stream, Cobb County Watershed Stewardship offers the training and tools to be a biological monitoring volunteer. Participants monitor the population and diversity of benthic macroinvertebrates, aquatic insects and mollusks that that bioindicators of water quality. The principle behind biological monitoring is that some species are more sensitive to pollution than others, each species occupies a different ecological niche. By studying the diversity of organisms at a site, we can get a general picture of water quality.

Citizens interested in biological monitoring are required to attend a certification workshop, as well as adopt their waterway site. We ask that all biological monitors commit to monitoring once per quarter.