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Old 05-26-2011, 09:13 PM   #21
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Ward Labs numbers are mg/L. For calcium 33 mg/L => 33/20 mEq/L => 33*50/20 = 82.5 ppm as CaCO3. Similarly for Mg, the hardness is 62 ppm as CaCO3.


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Old 05-27-2011, 12:34 PM   #22
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I could have sworn my Wards numbers were in ppm. Now I have to go home and check my report again!
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Old 05-27-2011, 12:50 PM   #23
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They are in ppm (mg/L) but it is "as the ion" not "as calcium carbonate". Everything on a Ward Labs report is as the ion with the exception of alkalinity (as CaCO3), sulfate (as sulfur) and nitrate (as nitrogen).
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