THE CORPORATION OF THE CITY OF MISSISSAUGA
PROPERTY STANDARDS BY-LAW 654-98
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(2) Water run-off from roof surfaces shall discharge into an eaves trough or
gutter and thence to a downpipe, discharging into a storm sewer and all
eaves troughs and drainpipes shall be maintained:
(a) watertight and free from leaks; and
(b) in working order and free from health hazards.
(3) Downpipes need not be connected to a storm sewer when arranged to
discharge water run-off at least three feet from the building and contained
on the property.
(4) Eaves troughs, gutters, downpipes and storm sewer connections are not
required when the roof is designed to prevent water run-off causing
deterioration to the building or creating a nuisance to persons on or
adjacent to the property.