Water Use Rules in Hawaii (2026)
4 rules on the books across Hawaii, 2 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
Recycled Water Rules
Where purple-pipe recycled water is required for irrigation, dual-plumbing requirements for new construction, and cross-connection-control rules.
Maui County
Significant RestrictionsMaui County requires improved commercial property in Central, South, and West Maui to connect to reclaimed water…
Read full rule →Kauai County
Some RestrictionsKaua'i County Code defines R-1 water as fully oxidized, filtered and disinfected recycled water and R-2 water as…
Read full rule →Leak Reporting Duty
Property owner's duty to report and repair water leaks within a set window once notified, plus how utilities issue leak-adjustment credits and impose penalties.
Kauai County
Some RestrictionsKaua'i County Code § 25-13.5(e) lets a sewer customer billed on a flat-plus-volume rate get their sewer charge adjusted…
Read full rule →Maui County
Light RestrictionsMaui County's water code puts leak detection largely in the Department of Water Supply's hands rather than on…
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