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All subsurface sewage disposal systems in Rhode Island are governed by 250-RICR-150-10-1 (Rules Establishing Minimum Standards Relating to Location, Design, Construction and Maintenance of Onsite Wastewater Treatment Systems). Authorized systems must maintain strict minimum horizontal clearance:
Private Drinking Well
100 feet min.
Property Line
10 feet min.
House Foundation
10 feet min.
Water Body / Stream
100 feet min.