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1 countyHawaii Septic Rules & Setback Standards
All subsurface sewage disposal systems in Hawaii are governed by Hawaii Administrative Rules Title 11 Chapter 62 & Act 125 (SLH 2017). Authorized systems must maintain strict minimum horizontal clearance:
Private Drinking Well
50 feet min.
Property Line
10 feet min.
House Foundation
10 feet min.
Water Body / Stream
50 feet min.