Potassium permanganate is used extensively in the water treatment industry. It is used as a regeneration chemical to remove iron and hydrogen sulfide (rotten egg smell) from well water via a "Manganese Greensand" Filter. "Pot-Perm" is also obtainable at pool supply stores and is used additionally to treat waste water. Historically it was used to disinfect drinking water.It currently finds application in the control of nuisance organisms such as Zebra mussels in fresh water collection and treatment systems.

Almost all applications of potassium permanganate exploit its oxidizing properties. As a strong oxidant that does not generate toxic byproducts, KMnO4 has many niche uses. One of the uses can be said to be as a fixative. This list is by no means the only applications that Potassium Permanganate is used for, but it covers some of the more common applications. The optimum condition under which it is to be used can be easily established through technical service evaluations or laboratory testing.

Water Treatment - Oxidizes iron, manganese, and hydrogensulfide; controls taste and odor; and is an alternate pre-oxidant for Disinfection By-Product (THMs and HAAs) control. Variety of disease causing organisms including bacteria, yeast, fungus, spores, and viruses growing in water. Drinking Water disinfectant can also be done by other common process process is to add 1-pound of calcium hypochlorite in granular form in to 10,000 gallons of drinking water. And Calcium Hypochlorite is widely available for use as swimming pool chlorine tablets or white powder that is much more stable than chlorine. And we have H2S vial (Bacteriological ) Kit use for checking microbiological quality of water. Water borne diseases like typhoid ,cholera, diarrhoea and jaundice and caused by polluted water supply.

Municipal Wastewater Treatment - Destroys hydrogen sulfide in wastewater and sludge. Improves sludge dewatering. Industrial Wastewater Treatment - Oxidizes hydrogen sulfide, phenols, iron, manganese, and many other organic and inorganic contaminants; resultant manganese dioxide aids in removing heavy metals.

Metal Surface Treatment - Conditions mill scale and smut to facilitate subsequent removal by acid pickling in wrought metals manufacturing and jet engine cleaning. Purification of Gases - Removes trace impurities of sulfur, arsine, phosphine, silane, borane, and sulfides from carbon dioxide and other industrial gases.

Mining and Metallurgical - Aids in separation of molybdenum from copper; removes impurities from zinc and cadmium; oxidizes flotation compounds. Removes iron and manganese from acid mine drainage.

Chemical manufacture and processing: Aids in synthesis of organic products for the chemical process and pharmaceutical industries.

Aquaculture (fish farming): Controls fish diseases and parasites, and detoxifies poisons while relieving oxygen depletion in fish ponds.

Air and gas purification: Removes pollutants from air and impurities from industrial gases, and quenches slag from foundry operations.

TYPICAL and Common use : 

Ethylene absorbents extend storage time of bananas even at high temperatures. This effect can be exploited by packing bananas in polyethylene together with potassium permanganate. By removing ethylene by oxidation, the permanganate delays the ripening, increasing the fruit's shelf life up to 4 weeks without the need for refrigeration.

Fumigation of Poultry farms, Hatcheries, Mushroom farms, other culture environment and Operation theatres in Hospitals.