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Findings > Metals

  • Aquatic Life Cold 1 standards were used to compare with analytical results for the seven metals that apply in evaluating streams for classification as Colorado Outstanding Waters.

  • The criteria shown for that comparison in the tables below have been hardness-adjusted, as required, except as is not necessary for selenium.

  • The analytical results are from samples collected seasonally since summer 2020 at nine study area streams, the same shown in non-metals findings.

  • As evident from examining the tables below, no metals (dissolved) concentrations at the nine streams were higher than the standards.

Winter 2022

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Fall 2021

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Temperature | Quality | Baseline | Findings

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Summer 2021

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Spring 2021

Winter 2021

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Fall 2020

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Summer 2020

Laboratory detection limits

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