Distribution of specific conductance, pH, acid neutralizing capacity, and concentrations of dissolved sulfate and dissolved manganese in stream water, by subwatershed, Upper Yampa River watershed, Colorado, 1975 through 2009 ...........26 7. Distribution of specific conductance, and concentrations of unfiltered sulfate, unfiltered total phosphorus, and total recoverable iron at Yampa River at Milner (site 151), by month, Upper Yampa River watershed, Colorado, 1975 through 2007 ........27 8. Location of water-quality sampling sites with exceedances of Colorado Department of Public Health and Environment in-stream water-quality standards for physical properties (pH, water temperature, dissolved oxygen), dissolved solids, and unfiltered sulfate and U.S. Environmental Protection Agency recommended concentrations for total phosphorus, Upper Yampa River watershed, Colorado, 1975 through 2009 ..
vi 8. Graph showing relation between nitrogen and oxygen isotopes of nitrate and potential nitrate sources and processes identified from data collected during sampling of the Upper Black Squirrel Creek Basin alluvial aquifer, El Paso County, Colorado, 2018-20 .
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