- Water other than sanitary wastewater entering the system from the ground through cracked pipes, connections or maintenance holes.
- Stormwater entering the system through eaves, foundation drains, maintenance hole covers, cross connections between storm sewers and sanitary sewers and storm drains.
Regina has two sewer systems:
Domestic sewer system
- Designed to carry sewage to the Wastewater Treatment Plan to be treated before returning it to the environment.
Storm sewer system
- Prevents streets from flooding by draining and carrying excess stormwater (water from rainfall and snowmelt) to Wascana Creek untreated.
Problems with Inflow and Infiltration
There are several problems caused by inflow and infiltration, including:
- Basement flooding caused by too much water in the domestic system.
- Reduced wastewater system capacity for residents.
- Makes sewage treatment less efficient since the sewage is diluted by water.
During heavy rainfall events, a combination of stormwater and wastewater may be released into the environment as a last resort to protect public assets and prevent basement flooding.
How can homeowners reduce the impact?
- Redirect downspouts into a rain barrel or a rain garden
- Be aware of aging pipes and of nearby trees that can cause root damage to underground pipes.
- Ensure your weeping tiles and / or sump pumps are not connected to the sanitary system.