The Ontario Building Code | Storm Drainage Systems
7.1.5.2. Storm drainage Systems
(1) Every storm drainage system shall be connected to a public storm sewage works, a public combined sewage works or a designated storm water disposal location but shall not be connected to a sanitary sewage works.
In Plain Language
Every storm drainage system must be connected to a public storm sewage works, a public combined sewage works, or a designated stormwater disposal location, with specific conditions governing which option applies.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.