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Murfreesboro, TN Water Use Rules: Recycled Water Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Use limited to
Toilets and urinals only
Building type
Commercial buildings only
Approval
Water Resources Department required
Pipe marking
Purple color, blue dye, signage

Summary

Murfreesboro allows re-purified (recycled) water systems in commercial buildings only, limited to flushing water closets and urinals, under Code § 23-2(HH) Chapter 13, with permits and plan approval required from the Water Resources Department.

1301.2 Use of re-purified water. Re-purified water systems may be installed and used only in commercial buildings and only to supply water closets/toilets and urinals....1303.2 Identification. All re-purified system piping must be purple in color and labeled "NON-POTABLE - DO NOT DRINK" in black lettering. The purple color must be integral to the material of all pipes, pipe fittings, and appurtenances.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 18 Update 1).

Full Breakdown

Code § 23-2(HH) replaces the plumbing code's gray-water chapter with a new Chapter 13 governing re-purified water systems in commercial buildings. Re-purified water may supply only water closets, toilets, and urinals: never residential use. Anyone installing, enlarging, altering, or replacing such a system must obtain a permit from the Chief Building Official and submit plans to the Water Resources Department for written approval before work begins. System piping must be permanently purple and labeled 'NON-POTABLE - DO NOT DRINK,' a blue dye must be injected into the water, and 'CAUTION - NON-POTABLE WATER' signs are required at every connected fixture.

Violations & Fines

Installing or operating a re-purified water system without Water Resources Department approval, or without required purple piping, dye injection, and warning signage, violates Chapter 13 and is enforced through the plumbing permit and inspection process.

Frequently Asked Questions

Can homes in Murfreesboro use re-purified/recycled water?
No. Section 1301.2 limits re-purified water systems to commercial buildings, and only for supplying water closets, toilets, and urinals.
What safety measures does the code require?
Purple-colored, labeled piping, an automatic blue dye injector, and 'CAUTION - NON-POTABLE WATER' signs at every fixture, plus a strict ban on any cross-connection to the potable water supply.

Sources & Official References

Other rules in Murfreesboro

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All Murfreesboro rules

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