Last reviewed: September 2026
Potassium permanganate (KMnO4) is a dry, crystalline oxidant used in drinking water, wastewater, and industrial water treatment. The U.S. Environmental Protection Agency identifies iron and manganese removal, hydrogen sulfide control, and treatment of selected taste- and odor-causing compounds among common permanganate applications.
Potassium Permanganate
Potassium Permanganate in Water Treatment
Common applications
- Oxidation of dissolved iron and manganese before clarification or filtration
- Hydrogen sulfide and associated odor control
- Taste and odor treatment in selected source waters
- Pretreatment programs where a strong oxidant is appropriate for the water chemistry
Process and handling considerations
Performance depends on oxidant demand, pH, temperature, reaction time, competing constituents, and downstream solids removal. Because potassium permanganate is supplied as a dry product, storage, dust control, compatible feed equipment, housekeeping, and operator training should be considered. Application rates should be established through water analysis and site-specific testing rather than a universal dosage.
Compare potassium and sodium permanganate for water treatment.
Contact WSU about potassium permanganate availability and delivery.
Source: U.S. EPA, Understanding Water Treatment Chemical Supply Chains and the Risk of Disruptions.
