Home Archived January 13, 2017

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National Water Quality Assessment Program (NAWQA)

Tennessee River Basin Study


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The theory that suggest “the more the better” typically holds true when evaluating streams and watersheds.  The more different kinds of fish present, usually, the better the water quality in the contributing watershed.  In some regions of the Tennessee Valley, a relatively undisturbed small stream (e.g., 50-60 square miles) can support between 30 and 40 species of fish, which offers just a subsample of the nearly 240 species that occur throughout the Tennessee Valley.

image of a redline darter

Redline darter (Etheostoma ruflineatum)


 image of a flame chub

 Flame chub (Hemitrema flammea)         


image of a greenside darter

Greenside darter  (Etheostoma blennoides)                  


Last Modified 7/3/01
maintainer rmitchel@usgs.gov