Quality Assessment: Biological
Photo: Justicia americana in Wheeling Creek. Photo courtesy of Dr. Ben Stout.
When assessing water quality, it is also important to look at the quality of organisms that live in a waterway. Some species are more sensitive to chemical and physical changes in their habitat than other species. If species that tend to be sensitive to pollution are present in a waterway, then that waterway most likely has good water quality.
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