Benthic macroinvertebrate data collected indicates that there is a lack of taxa richness within the stream. Additionally, there is a predominance of pollution tolerant invertebrates. Noticeably lacking are pollution intolerant species. These results substantiate chemical test results. Using this data and a filter membrane technique, it has been determined that sedimentation and bedload being carried by stream flow averages 2 to 3 tons per day.
Sedimentation significantly accelerates the process of eutrophication.
Sedimentation also increases turbidity, which in turn reduces photosynthetic activity, increases carbon dioxide levels and decreases dissolved oxygen levels. It may also clog the gills of aquatic organisms, hampering respiration. What is of great concern, however, is the accumulation of these sediments in the Taunton River basin. Location of test sites along the course of the stream, in addition to the chemical data obtained, have indicated the BFI landfill on Airport Road as the most likely source of contaminants. Construction near the old municipal airport may contribute to the levels of sedimentation.