Why does my water taste metallic?
A metallic taste almost always means a metal has dissolved into your water — most often iron, copper, or manganese, and occasionally lead.
The likely causes
The most common cause. Iron leaches from old pipes or comes from groundwater. It is not a health risk, but it tastes like metal and can stain.
Dissolves from copper plumbing, especially when water sits overnight or the water is acidic (low pH). High levels can upset your stomach.
Often paired with iron in groundwater; tastes metallic and leaves black specks or stains.
Lead can taste faintly metallic but is often tasteless — so a metallic taste is a reason to rule it out, not proof of it. Lead has no safe level.
Acidic water corrodes metal pipes, pulling copper, lead, and iron into your water. Fixing the pH fixes several problems at once.
Is it dangerous?
Usually the cause (iron, manganese) is a harmless nuisance. But because copper and lead can also taste metallic — and lead is dangerous at any level — a metallic taste is worth confirming, especially in an older home or one with lead pipes.
How to tell what it is
Note when you taste it: only first thing in the morning points to your household plumbing (copper/lead), while all-day points to the source water (iron/manganese). A home test kit or a certified lab test tells you which metal — and lead is the one worth testing for directly.
The fix
For metals at the drinking tap, a reverse-osmosis system or an under-sink filter certified to NSF/ANSI 53 removes lead and copper. For whole-house iron/manganese, a whole-house filter is the right tool. If low pH is the cause, a neutralizer treats the root.
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