Honolulu vs Waipahu
How do water restrictions rules compare between Honolulu, HI and Waipahu, HI?
Honolulu and Waipahu have similar restriction levels.
Honolulu, HI
Honolulu County
Honolulu's Board of Water Supply (BWS) may declare mandatory water-conservation stages restricting outdoor irrigation timing and volume. The Land Use Ordinance also requires permanent irrigation systems for required landscaping on development sites.
View full Honolulu rules →Waipahu, HI
Honolulu County
Waipahu follows ROH Chapter 30 water management rules plus Board of Water Supply shortage stages, which hit leeward Oahu communities like Waipahu early during drought.
View full Waipahu rules →Key Facts Comparison
| Fact | Honolulu | Waipahu |
|---|---|---|
| Conservation authority | Board of Water Supply (BWS) | - |
| Irrigation system required | Yes, for LUO-required landscaping | - |
| Restriction levels | Voluntary to mandatory stages | - |
| Violation penalty | Misdemeanor, daily fines | - |
| Code | - | ROH Sec. 30-2.3 |
| Shortage authority | - | Board of Water Supply |
| Shortage stages | - | Four graduated levels |
| Rebates | - | BWS rain barrel and xeriscape |
Highlighted rows indicate differences between cities.
Honolulu FAQ
Are there currently mandatory outdoor watering restrictions in Honolulu?
Restrictions vary; the BWS may activate mandatory conservation stages during drought. Check the BWS website or call (808) 748-5000 for the current status.
When is outdoor irrigation recommended to avoid waste?
BWS recommends watering before 9 AM or after 5 PM to minimize evaporation. Weather-based irrigation controllers are also encouraged year-round.
Does new construction need a permanent irrigation system?
Yes. ROH § 21-4.70 requires all required landscaping on development sites to have a permanent irrigation system installed.
Waipahu FAQ
Are Waipahu yards always on watering-day restrictions?
No. Day-of-week schedules activate only when the Board of Water Supply declares a numbered shortage stage. Otherwise, standard conservation practices apply.
Can Waipahu farmers near Kunia use non-potable water?
ROH Chapter 30 and BWS policy encourage non-potable use where available. Agricultural irrigation typically uses separate ditch systems or dedicated non-potable connections.
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