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Color of Stain
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Possible Cause |
Treatment Options |
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| White, gray |
Calcium hardness |
Water softening |
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Alkalinity |
Deionization, de-alkalizers |
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Total Dissolved Solids |
Reverse Osmosis |
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| Rust, orange, yellow |
Iron |
Iron filter |
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Corrosion iron pipes |
Corrosion control, acid neutralizer |
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| Black, brown |
Manganese |
Greensand filter, chlorination followed by filtration |
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Iron bacteria |
Chlorination or ozone, followed by filtration |
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Hydrogen sulfide |
Chlorination or ozone, followed by filtration |
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Tannins, humic acid |
Tannin filter, chlorination followed by filtration |
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| Blue, green |
Corrosion copper pipes |
Corrosion control, acid neutralizer |
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| Pink |
Airborne bacteria |
Clean sinks, fixtures (not a water quality issue) |
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Have Questions. Get help here.
Want More Information about well water? Visit USEPA site about Private Drinking Water Wells .
Get complete well water testing: See all well water test kits.
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