Potassium (K)
A monovalent cation. It is typically found at much lower concentrations than sodium. The salts of potassium are highly…
pH
The pH of the feed water measures the acidity or basicity. A pH of 7.0 is considered neutral. A…
Nitrate (NO3)
A monovalent anion. Nitrate salts are highly soluble and do not cause a RO scaling problem. Nitrate, along with…
Mg/l
A method of reporting the "actual" weight (milligrams) of an ion or substance in a given volume of water…
Meq/l
A method of reporting the concentration or "equivalent" weight of an ion or substance in a given volume of…
Manganese (Mn)
Manganese is a water contaminant present in both well and surface waters, with levels up to 3 ppm. Manganese,…
Magnesium (Mg)
A divalent cation. Magnesium can account for about a third of the hardness in a brackish water, but can…
Iron (Fe)
Iron is a water contaminant that takes two major forms. The water-soluble form is known as the ferrous state…
Ionic Strength
The solubility of sparingly soluble salts increases with increasing feed TDS. To account for this effect in calculating the…
Hydrogen Sulfide (H2S)
Hydrogen sulfide is a gas that causes the noticeable "rotten egg" smell in feed waters, with a threshold odor…