PART 8 — SEWAGE SYSTEMSUpdated for the 2024 Ontario Building Code
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8.9.3.4.Class 4 Sewage Systems
(1) Septic tanks and other treatment units shall be cleaned whenever sludge and scum occupy one-third of the working
capacity of the tank.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.