Water Spots and Staining
Water spots are common problems with water from sustainable water sources. Here’s a list of common water stains and how to treat them.
Color of Stain | Possible Cause | Treatment Options |
White, gray water spots | Calcium hardness | Water softening |
Alkalinity | Deionization, de-alkalizers | |
Total Dissolved Solids | Reverse Osmosis | |
Rust, orange, yellow | Iron | Iron filter |
Corrosion iron pipes | Corrosion control, acid neutralizer | |
Black, brown | Manganese | Greensand filter, chlorination followed by filtration |
Iron bacteria | Chlorination or ozone, followed by filtration | |
Hydrogen sulfide | Chlorination or ozone, followed by filtration | |
Tannins, humic acid | Tannin filter, chlorination followed by filtration | |
Blue, green | Corrosion copper pipes | Corrosion control, acid neutralizer |
Pink | Airborne bacteria | Clean sinks, fixtures (not a water quality issue) |
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