Sewage backups and biohazard incidents aren't a bigger version of a regular water leak. A cracked pipe is unpleasant. A sewer backup, a flooded basement that's been sitting for days, or a trauma or unattended-death scene involves contaminated water or materials that carry real health risks. Category 3 water (the industry term for sewage-contaminated water) can carry bacteria, viruses, and parasites, and it spreads fast into drywall, subflooring, and carpet padding. This category covers the 10 Ottawa companies equipped to handle that level of contamination safely, not just general water extraction.
What the job actually involves
A proper sewage or biohazard job starts with containment (sealing off the affected area so contaminants don't spread through the HVAC system or hallways), followed by extraction, removal of anything porous that's absorbed contaminated material, antimicrobial treatment, structural drying, and air quality verification before the space is cleared for use. The team should show up in full PPE (suits, respirators, gloves) and dispose of waste according to biohazard handling regulations, not just bag it with regular garbage.
What to check before hiring
Ask specifically about IICRC certification for water damage and biohazard remediation, whether they carry their own biohazard waste disposal permits or subcontract that step, and what their containment protocol looks like on a sewage job versus a clean-water flood. Response time matters here more than almost any other restoration category: the longer contaminated water sits, the more has to be torn out and replaced.
Our ranked guide to Ottawa water damage restoration services scores providers on certifications, response speed, and how they handle exactly these situations. See our methodology for how the scoring works.