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Ground Water Quality Standards(1) <br /> Units <br /> m I <br /> Physical pH 6.0-9.0 <br /> Inorganic Nitrate NO3 10 mg/1 <br /> Inorganic Chloride CI mg/1 <br /> Inorganic u ate SO4 250 mg/l <br /> Metals Aluminum Al 5 mg/1 Agriculture Standards <br /> Domestic Water Supply- <br /> Metals Antimony Sb 0.006 mg/1 Human Health Standards <br /> Domestic Water Supply- <br /> Metals Arsenic As 0.01 mg/1 Human Health Standards <br /> Domestic Water Supply- <br /> Metals Barium Ba 2 Human Health Standards <br /> Domestic Water Supply- <br /> Metals Cadmium Cd 0.004 mg/1 Human Health Standards <br /> domestic Water Supply- <br /> Metals Chromium Crlll 0.1 mg/1 Human Health Standards <br /> Metals Colbalt Co 0.05 <br /> Metals Copper Cu 0.2 m Agriculture Standards <br /> Domestic Water Supply- <br /> Metals Iron Fe 0.3 m I Human Health Standards <br /> Domestic Water Supply- <br /> Metals Lead Pb 0.005 m l Human Health Standards <br /> Metals Manganese Mn 0.05 mg/1 Agriculture Standards <br /> Domestic Water Supply- <br /> Metals Mercury Hg 0.002 m 1 Human Health Standards <br /> Molybdenu Domestic Water Supply- <br /> Metals m Mo 0.035 mg/1 Human Health Standards <br /> Domestic Water Supply- <br /> Metals Nickel Ni 0.1 m l Human Health Standards <br /> Domestic Water Supply- <br /> Metals Selenium Se 0.05 m I Human Health Standards <br /> Domestic Water Supply- <br /> Metals Silver Ag 0.05 mg/1 Human Health Standards <br /> Metals Zinc Zn 2 1 mg/1 jAgriculture Standards <br /> ���CDPHE-Water Quality Control Division Regulation 41 Table 1,2 and 3 <br />