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Purple pipe origin story: the true tale of how IRWD set a …
Purple Pipes' to Deliver Recycled Water to City Landscapes …
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A purple pipeline is a color-coded pipe system used to transport recycled (reclaimed) water, not for drinking, but for uses like landscape irrigation, toilet flushing, and industrial cooling, with the color adopted from the Irvine Ranch Water District in California in the 1980s as a safety and public awareness standard. This distinctive purple color, often "Irvine Purple," clearly distinguishes non-potable recycled water from potable (drinking) water, preventing accidental cross-contamination and promoting water conservation