Inorganic
Manganese in your water
Health effects
Manganese is a natural mineral that is essential in small amounts but harmful in excess. High long-term exposure, especially in infants, is linked to neurological and developmental effects. It also causes black staining and off taste, so it is mainly a secondary (aesthetic) federal concern.
The guideline vs. the legal limit
The federal legal limit is the maximum allowed by law. The EWG health guideline is what independent scientists consider safe — it is often far stricter.
Health guideline (EWG)
100 ppb
Federal legal limit (MCL)
No federal limit set
Source: EWG Tap Water Database & EPA MCLs · 2026
What removes Manganese
Culligan · Water Softeners
Culligan High Efficiency (HE) Water Softener
- type
- salt-based ion exchange
- smart
- true
- flow gpm
- 10-20
Whirlpool · Water Softeners
Whirlpool WHES40E 40,000-Grain Softener
- type
- salt-based ion exchange
- smart
- false
- flow gpm
- up to 9
Kinetico · Water Softeners
Kinetico Premier Series Water Softener
- type
- non-electric twin-tank ion exchange
- smart
- false
- flow gpm
- up to 24
RainSoft (Aquion) · Water Softeners
RainSoft EC5 Water Conditioning System
- type
- salt-based ion exchange
- smart
- true
- flow gpm
- varies by tank
SoftPro (Quality Water Treatment) · Water Softeners
SoftPro Elite Water Softener
- type
- salt-based upflow ion exchange
- smart
- true
- flow gpm
- up to 20
SpringWell Water · Whole-House Filtration
SpringWell CF1 Whole House Filter (1,000,000 gal)
- media
- catalytic carbon + KDF + sediment
- stages
- 4
- flow gpm
- 9-20
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Is Manganese in your water?
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