Purple pipes started in California—and now they’re everywhere to mark recycled water.

In the 1980s, Irvine Ranch Water District pioneered the use of purple pipe to safely distribute recycled water and clearly distinguish it from drinking water and sewer lines.

The color has become a global symbol of water reuse, raising awareness and helping communities embrace sustainable solutions.

Today, Irvine Ranch continues the tradition by sending 24 million gallons of recycled water daily through 550 miles of purple pipe to over 5,000 customers.

Content in collaboration with WateReuse California.

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