Flooding of the sanity sewer system can occur on residential/industrial property, or on public and city regulated property. Sanitary sewer backups can be a result of blockages or pipe breaks.
Blockages occur because of excess grease, food or any other materials such as wet wipes, flushed or poured down the drain. This material accumulates in pipes and restricts the flow, causing a backup. Breaks in underground pipes may happen due to faulty installation, pipe age, digging, or invading tree roots.
The City of Markham will repair any blockages or breaks on the Markham-owned portion of the pipes as quickly as possible. However, pipes in a residential/industrial building, as well as the underground pipes from the building to the property line, are the responsibility of the property owner.