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As part of the National Water Quality Assessment (NAWQA) Program, fish communities were sampled at 11 sites in the White River Basin, Indiana, in 1993 and 1995 to help determine water-quality conditions. Ninety-one species of fish with representatives from 18 families were collected in the basin. Total numbers of fish collected at every site increased between collection years. The Index of Biological Integrity (IBI) and Qualitative Habitat Evaluation Index (QHEI) were calculated for all 11 sites in 1995. The QHEI scores indicated six sites had excellent habitat to support fish communities. Only three sites were rated in the "good" to "excellent" IBI water-quality categories, indicating some type of nonhabitat environmental degradation to the fish communities. Eight of the sites were rated in the "fair," "poor," or "very poor" IBI water-quality categories.

Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices