The addition of orthophosphate may cause drinking water to temporarily turn reddish-orange (red water). What causes this color change and what should I do?
The addition of orthophosphate in drinking water may cause iron to dissolve from water pipes into the water. The color change is temporary and will normally go away by running your cold water until it is clear. Do not drink, cook, wash clothes or use hot water that is discolored. If after repeated flushing the problem persists, then contact your water utility.
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