The Colorado Department of Public Health and the Environment (CDPHE) has identified McPhee & Narraguinnep Reservoirs as not supporting their designated uses due to the presence of elevated fish tissue concentrations of mercury that have resulted in Fish Consumption Advisories. Mercury concentrations at the levels observed present a significant health risk to persons who consume listed fish from the reservoirs. Because McPhee & Narraguinnep Reservoirs do not support their designated uses, a Total Maximum Daily Load (TMDL) is required for mercury loading to the reservoirs. The purpose of this TMDL is to provide an estimate of pollutant loading reductions needed to restore the classified uses of McPhee and Narraguinnep reservoirs. The U.S. Environmental Protection Agency (EPA), Region 8, is supporting CDPHE in the development of this TMDL.
