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ASSESSMENT OF POSSIBLE EFFECTS OF POCATELLO'S TREATED WASTEWATER ON THE BIOLOGY AND CHEMISTRY OF THE PORTNEUF RIVER, IDAHO. 1989
Description:
This report describes results of a study to determine possible effects of Pocatellos Wastewater Treatment Plant (WWTP) on the Portneuf River, Idaho (17040208). The scope of this report includes data collected on water chemistry, macroinvertebrates, and fish during fall 1988 and summer 1989. Throughout the effluent plume, dissolved oxygen, pH, and temperature were within acceptable ranges for maintenance of cold-water aquatic biota. Un-ionized ammonia exceeded EPAs water quality standard during some days of August 1989. Samples of the macroinvertebrate community within the plume showed a clear indication of environmental impairment. There were fewer game fish above the WWTP than below in both summer 1988 and fall 1989, while the opposite held true for non-game fish. During 1988-1989, effluent from the Pocatello WWTP had a detectable impact on water chemistry and macroinvertebrate assemblages in the lower Portneuf River. 1989. Final Report. Prepared by Pocatello Department of Environmental Quality; Rapid Creek Water Works; Stream Ecology Center, Idaho State University; and Tribal Fisheries Department, Shoshone-Bannock Tribes.