Water Use Rules in Honolulu, HI (2026)
4 verified water use rules for Honolulu, Hawaii, sourced directly from the municipal code and official government pages.
Verified from official government sources
Lawn Watering Restrictions
The Honolulu Board of Water Supply (BWS) sets island-wide conservation targets and can declare mandatory restrictions on lawn irrigation under ROH chapter 17 during droughts.
BWS Voluntary And Mandatory Irrigation Limits
Some RestrictionsTurf Replacement Rebates
The Honolulu Board of Water Supply offers rebates for replacing thirsty lawns with drought-tolerant landscaping and for installing high-efficiency irrigation controllers.
BWS Rebates For Lawn Replacement And Efficient Irrigation
Few RestrictionsRecycled Water Rules
The Honouliuli Water Recycling Facility produces R-1 recycled water for irrigation in Ewa, and customers connecting to the recycled water system pay reduced rates under BWS rules.
Honouliuli R-1 Recycled Water Program
Few RestrictionsLeak Reporting Duty
BWS rules require customers to repair private-side leaks promptly and to report suspected water main breaks, with bill adjustments available for documented hidden leaks.
Customer Duty To Repair Leaks And Report Mainbreaks
Some RestrictionsLooking for Honolulu County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Honolulu city rules.
Water Use Rules in Honolulu County →