One of the most urgent matters a homeowner needs to face is the treatment of his water, especially if he gets it from a well. This is because water, wherever it may come from, is prone to bacteria attack, and everyone knows that bacteria can cause great damage not just to the water system—clogged pipes and all—but to one’s health. The good news is that there are a number of substances you can turn to in order to ensure the cleanliness and safety of the water you drink. This article lists down the most commonly known well water treatment chemicals.

Potassium Permanganate

Listed as KMnO4, this chemical acts as an oxidizing agent. It is usually added to the water to remove organic contaminants and other chemicals with objectionable odor and taste like manganese and iron, the usual suspects in weakened plumbing fixtures and stained laundry. Potassium permanganate is mostly recommended for the treatment of well water that originates from a lake.

Aluminum Sulfate

Listed as Al2(SO4)3, this chemical is normally mixed with water to create a 48%-concentration filter alum solution that can be used to treat raw water. A common ingredient in deodorants and baking powders, filter alum as a well water chemical acts as a coagulant, binding microscopic particles together to form larger entities that can be easily taken out via settling and filtration. Through these methods, the “cloudiness” in the water, marked by a gray color and an obvious turbidity, is then addressed.


Chlorine is arguably the most popular of all well water treatment chemicals, and in terms of public health, it really has been the most helpful of them all. Before it was discovered as an effective water treatment chemical, epidemics caused by typhoid fever and other waterborne diseases took the lives of thousands, many of which were small children.

Chlorine is used as a liquid solution not just to make its strong smell more acceptable but to enhance its disinfectant properties as well. It works to oxidize all undesirable elements and destroy all pathogenic microorganisms lurking in the water. The most common sources of chlorine include calcium hypochlorite tablets, sodium hypochlorite solutions, and gaseous chlorine. Many manufacturers of chlorine solutions for water treatment have switched to sodium hypochlorite from gaseous chlorine due to safety issues.

Polyphosphate Polymer

This substance is actually found in a liquid chemical solution called calciquest. Its purpose is primarily to isolate calcium, manganese and iron from the water in order to fight them more easily and, as a result thereof, keep water lines from the house to the well safe from corrosion.

Hydrofluosilicic Acid

Listed as H2SiF6, the last chemical in this list of well water treatment chemicals is utilized for the maintenance of fluoride concentrations at levels that can lower the risk of tooth decay. When used optimally, Hydrofluosilicic acid can decrease tooth decay incidences by a whopping 65%. However, the temperature of the area where the well is situated may play a role in the effectiveness of fluoride. The solution is used in the final stages of treatment, before the well water reenters your house’s water distribution system.