Basement flooding or sewage backup
Do This Now
- Do not enter the basement if water is near electrical outlets — turn off power at the panel first
- If it is sewage backup, do not use any water fixtures in the home (toilets, sinks, laundry)
- If the flooding is clean water (burst pipe or sump failure), shut off the main water supply
- Call a plumber immediately — sewage backup can contain E. coli and other pathogens
- Contact your home insurer — overland water and sewer backup are often separate riders
- Do not attempt to clean up sewage backup without proper PPE (gloves, eye protection, N95 respirator)
Common Causes
- Main sewer line blockage (grease, wipes, roots)
- Failed or overwhelmed sump pump during spring melt or heavy rain
- Municipal combined sewer surcharge during storms
- Collapsed sewer pipe (common in older Innisfail homes with clay tile mains)
- Backwater valve failure or absence
When to Call a Pro
- Any time sewage is backing up — this is a health hazard requiring immediate professional attention
- Water level is rising faster than a shop vac can remove it
- You suspect the main sewer line is blocked or collapsed
Alberta Context
Spring snowmelt in Central Alberta (typically March-April) puts significant pressure on drainage systems. Many older Innisfail homes lack a backwater valve — a one-way valve that prevents municipal sewer surcharges from entering your basement. Installation costs $800-$1,500 and may qualify for a municipality subsidy. The Town of Innisfail operates a separate storm and sanitary sewer system in most areas.