Manganese in Water

Manganese is an essential nutrient, required in trace amounts for human health.

Manganese stains.

  • The presence of black stains, particles and metallic taste often makes it obvious that manganese is present in the water even without water testing.
  • Initially clear water that subsequently forms black solid particles over time contains reduced manganese.

Dissolved Manganese.

  • Dissolved or reduced manganese is most common in groundwater with a pH less than 7.0.
  • Solid black particles that appear immediately in water contain the oxidized form of manganese.
  • Manganese toxicity targets the brain and central nervous system.

Exposures to Manganese.

  • Exposures to manganese in drinking water are much lower than the high inhalation exposures seen in industry that have been associated with severe neurological and neuromuscular effects.

Infants and manganese.

  • However, elevated manganese in drinking water is of particular concern for formula-fed infants.  
  • Infants will absorb a higher amount of manganese than the rest of the family.
  • Did you know that infant milk formula is already supplemented with manganese.
  • Infants also tend to absorb more manganese and have a reduced capacity to excrete it.
  • Treatment for manganese removal includes water softening, oxidizing filters, polyphosphate addition,  or oxidizing always followed by the application of filtration.
  • Less common treatments include ozonation, aeration, and catalytic carbon.
Manganese in Water
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