Common Symbols Used in Water Treatment

CATIONS ANIONS Calcium, Ca++ Nitrate, NO3– Magnesium, Mg++ Chloride, Cl– Iron, Fe++ Sulfate, SO4– Manganese, Mn++ Bicarbonate, HCO3– Sodium, Na+ Calcium Carbonate, CaCO3– Copper, Cu++ Hydroxide, OH– Hydrogen Sulfide, H2S   Carbon Dioxide, CO2   Oxygen, O2