Water Restrictions: Honolulu vs Mililani Mauka
How do water restrictions rules compare between Honolulu, HI and Mililani Mauka, HI?
Honolulu and Mililani Mauka 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 →Mililani Mauka, HI
Honolulu County
Mililani Mauka outdoor irrigation falls under ROH Chapter 30 and Board of Water Supply shortage stages that can restrict watering days and hours.
View full Mililani Mauka rules →Key Facts Comparison
| Fact | Honolulu | Mililani Mauka |
|---|---|---|
| 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 |
| Operational rules | - | BWS shortage stages 1-4 |
| Context | - | Central Oahu plateau |
| HOA role | - | Common-area irrigation |
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.
Mililani Mauka FAQ
Are watering days mandatory in Mililani Mauka?
Only when BWS declares a shortage stage. Normal operations have no fixed watering days, though BWS encourages early morning irrigation year round.
Does the Mauka HOA adjust common-area irrigation?
Yes. During BWS shortage stages, the Mililani Mauka Community Association adjusts park and streetscape irrigation schedules to match city-wide restrictions.
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