Any pool over 18 inches deep must have a compliant safety barrier. Public pools also follow State DOH operating standards. Private residential pools at single-family homes are exempt from the DOH public-pool rules but still need the county barrier.
For homes, the safety focus is the barrier: 48-inch enclosure, no 4-inch openings, self-latching gate, under the county-adopted building code. A powered safety cover, or a spa cover meeting ASTM F1346, can substitute for the barrier. Public swimming pools (commercial, hotel, HOA, community pools) additionally follow the State Department of Health rules in HAR 11-10 for water quality, records and posted rules - HAR 11-10-1 confirms those rules do not apply to private residential pools. Hawai'i has no citywide pool ordinance because the county is the sole local government island-wide.
Barrier failures block permit finals and draw Public Works correction orders. Public-pool operators who violate HAR 11-10 face DOH penalties under HRS 321-18 and 321-20 and possible permit suspension.
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