What is Manganese?
Manganese is a metal element that is found naturally in the ground. It is a trace element required for human metabolism. However at higher levels manganese is a neurotoxin.
It is very commonly found in ground water sources, usually alongside iron.
The New Zealand drinking water standards give a guideline value of 0.04mg/L for taste, staining and smell as well as a maximum acceptable value of 0.4mg/L to protect health.