Why is my water brown, yellow, or orange?
Brown, yellow, or orange water is almost always iron or rust from pipes or the water main — or tannins from decaying vegetation in well water.
The likely causes
Corroding iron pipes or a disturbed water main release rust that tints water yellow to brown. Harmless to drink but stains laundry and fixtures.
Gives a brown-to-black tint and stains, often alongside iron in groundwater.
Organic “tea” color from decaying leaves and vegetation, common in shallow wells and surface water. Harmless but discoloring.
Sudden brown water across the neighborhood is usually temporary — the utility stirred up sediment. It typically clears in a few hours.
Is it dangerous?
Iron, manganese, and tannins are aesthetic problems, not health hazards, though few people want to drink brown water. The exception worth noting: brown water plus old lead pipes is a reason to test for lead, since corrosion can carry it too.
How to tell what it is
If the whole neighborhood is affected and it clears within hours, it was hydrant flushing — run your cold tap a few minutes. If only your home is affected or it persists, it is your plumbing or well; a test identifies iron vs. manganese vs. tannins.
The fix
A whole-house iron/sediment filter is the standard fix for discoloration from iron and manganese. Tannins need a specific tannin filter. At the drinking tap, an under-sink or RO system gives clear water immediately.
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