Manganese
A naturally occurring metal that can cause black staining and discolouration in water at elevated levels.
ADWG Guideline
0.1 mg/L
Manganese occurs naturally in rocks and soil, dissolving into water as it passes through geological formations. It is commonly found alongside iron in groundwater.
Why it matters
The ADWG sets a guideline of 0.1 mg/L (health) and 0.1 mg/L (aesthetic). At elevated levels:
- Black/brown staining on laundry, fixtures, and dishes
- Discolouration — water may appear brown or black when disturbed
- Health concerns at high levels — the ADWG health guideline reflects evidence that very high manganese intake may affect neurological development in children
Common in bore water
Manganese is more common in bore water and groundwater supplies than in treated surface water. Water utilities typically remove it through oxidation and filtration.
Check Your Water
See how manganese levels compare in your suburb with real water quality data.
Disclaimer: Glossary definitions are provided for general educational purposes only and do not constitute medical advice or professional guidance. For specific health concerns about your drinking water, consult a qualified health professional. See our Terms of Use.