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COLORADO LEGACY LAND <br /> Notes: <br /> 1 Acute and chronic standards for cadmium,chromium 111,copper,lead,manganese,nickel,silver,uranium,and zinc are calculated using an average hardness value of 163 mg/L as CaCO3. <br /> Bold and grey-shaded analytical results are detected above the criteria. <br /> B=Estimated concentration <br /> NO3=Nitrate <br /> NO2=Nitrite <br /> CaCO3=Calcium Carbonate <br /> mg/L=Milligrams per Liter <br /> pCi/L=PicoCuries per Liter <br /> Chromium III=Trivalent Chromium <br /> Chromium VI=Hexavalent Chromium <br /> Source: CDPHE. 2021. Regulation No.38 Stream Classification and Water Quality Standards,Clear Creek Basin,Segment 17b.Mainstem of Ralston Creek Including all Tributaries and Wetlands from the Source to the Inlet <br />