(a) The calcium, magnesium, and iron hardness expressed as meq/L and as mg/L equivalent CaCO3. (b) The total hardness as meq/L and as mg/L equivalent CaCO3. (c) The alkalinity as meq/L and as mg/L equivalent CaCO3. (d) The nitrate as mg/L nitrogen (N). (e) The hydrogen and hydroxyl ion concentration in moles/L