Orange County NC Website
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0019 : <br /> As shown on the attached map, about 12% of the County's land area can be <br /> categorized as having high susceptibility to contamination. About 21% of the <br /> County ranks as low potential for contamination. <br /> Water Quality Summary <br /> Table 2 <br /> Comparison of Selected Results and Drinking Water Standards <br /> Measure High Low • EPA/State <br /> Reading Reading Limits for <br /> Driking <br /> Water <br /> PH (units) 8.3 4.72 6.93 Not less than <br /> 6.5 units <br /> Conductivity 523 ms/cm 26 ms/cm 180 ms/cm No established <br /> (microsiemens limits <br /> r centimeter <br /> Dissolved 9.4 mg/L 0.03 mg/L 2.5 mg/L No established <br /> Oxygen limits <br /> (milligrams per <br /> Litre <br /> Alkalinity 194 mg/L 24 mg/L 103 mg/L No established <br /> limits <br /> Nitrate 7.2 m /L 0.02 m L 0.49 m L 10 m /L <br /> Iron 1100 1 N/A 0.30 m L <br /> Manganese 890 0.4 N/A 0.05 mg/L <br /> (micrograms per <br /> Litre <br /> Calcium 64 mg/L 0.8 mg/L 23 mg/L No established <br /> limits <br /> Magnesium 21 mg/L 1 mg/L 4.4 mg/L No established <br /> limits <br /> Fluoride 0.6 m /L 0.1 m /L 0.12 4 m /L <br /> Lead 3.7 1.1 N/A 0.015 m /L <br /> Zinc 4900 4.5 N/A 5.0 mg/L <br /> (micrograms per <br /> Litre <br /> Copper 24 1.1 N/A 1.3 mg/L <br /> (micrograms/ <br /> Litre <br /> Radon 4462 pCi/L 38 pCi/L 405 pCi/L 300 pCi/L or <br /> (picocuries/Litre) 4,000 Ci/L <br /> 12 <br />