Iron
What it is
A common natural mineral in Maryland groundwater, especially on the Eastern Shore. It can also come from rusting pipes.
Your body
EPA treats iron as a cosmetic (secondary) issue rather than a health risk at levels found in drinking water.
Your home
Iron causes orange-brown stains on sinks, tubs, toilets, and laundry, and a metallic taste. It can also feed iron bacteria and clog pipes, valves, and water treatment equipment.
Federal standard: Secondary standard 0.3 ppm (EPA, non-enforceable)
Treatment options that can reduce it
The right iron treatment depends on the amount and type of iron. A water test tells us which.
Research & sources (2)
Maryland water systems that reported iron
- City of FrederickFrederick · 2025 data
See common private-well contaminants →
The information on this site is for general education only and is not medical advice. Talk with a qualified health professional about health concerns. Water treatment equipment performance depends on the system, its certification, and proper maintenance.
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