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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Table 2.3 Description of Water Quality Parameters <br /> <br />Parameter Description/Relationships <br />Iron Second most abundant metallic element in earth's crust. Excessive amounts <br /> may cause staining of plumbing fixtures and laundry. <br />Lead Lead in the air can attach to dust particles and be transported long distances <br /> before being washed into rivers by rain or snow. Highly toxic, can <br /> accumulate in fish and human tissue with negative health effects. <br />Magnesium Common in sedimentary rocks. Not generally a water quality concern, <br /> although related to water hardness. <br />Manganese Essential element in plant and animal metabolism. Elevated manganese in <br /> water systems is therefore often related to human or organic influences. <br />Selenium A metal common to the Mancos shale soils of this area. May leach from <br /> soils via irrigation and cause reproductive and health problems in birds and <br /> fish. <br />Zinc Zinc is relatively abundant, but may be released to the environment by coal <br /> burning, mining, and other industrial sources. Zinc bio-magnifies in fish and <br /> other organisms. Often attaches to soil particles. <br /> <br />2.4 How Often Do We Sample and Where Are Samples <br />Analyzed? <br /> <br />Sample frequency is a function of the water quality parameters of interest, seasonal <br />variability, and volunteer availability. The minimum sample frequency for basic stream <br />parameters is illustrated below: <br /> <br />METALS, NUTRIENTS, and FIELD PARAMETERS <br /> <br />Month J F M A M J J A S 0 N D <br /># of Samples 1 1 1 1 1 1 1 1 1 1 1 1 <br /> <br />BACTERIA <br /> <br />Month J F M A M J J A S 0 N D <br /># of Samples I 1 1 1 2 2 2 2 2 1 1 1 <br /> <br />Field parameters are analyzed immediately in the laboratory at the CSU Rogers Mesa <br />Research Station in Hotchkiss, Colorado. The remaining samples are analyzed at the <br />following laboratories: <br /> <br />. Metals: CDOW Laboratory, Fort Collins, Colorado <br /> <br />. Nutrients: CDPHE, Inorganic Chemistry Laboratory, Denver, Colorado <br /> <br />. Bacteria: EP A Region 8 Laboratory, Golden, Colorado. <br /> <br />2-5 <br />