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TABLE 10 <br />CDOH Surface Water Agricultural Use Standards <br />Arsenic, ug/l A <br />Boron, ug/l B <br />Cadmium, ug/l A <br />Chromium, ug/l A <br />Copper, ug/l A <br />Lead, ug/l ° <br />Manganese, mg/l A,n <br />Nickel, ug/l A <br />Nitrate, Nitrogen, mg/1° <br />Nitrite, Nitrogen, mg/l c <br />Selenium, ug/l A <br />Zinc, mg/l A <br />A . CDOH surface water agricultural standard. <br />groundwater irrigation standard. <br />100.0 <br />750.0 <br />10.0 <br />100.0 <br />200.0 <br />100.0 <br />0.2 <br />200.0 <br />100.0 <br />10.0 <br />20.0 <br />2.0 <br />Same as the CDOH <br />B . CDOH surface water standard is set to protect sensitive plant <br />species. Standard for plant species grown in Routt County is 5000 ug/l. <br />C CDOH surface water agricultural standard. Same as the CDOH <br />groundwater livestock standard. <br />D : This standard in only appropriate where irrigation water is applied <br />to soils with pH values lower than 6.0. <br />