Sewage backups and biohazard incidents are a different category of problem than a burst pipe or a leaky roof. A sewage cleanup involves removing contaminated water and solids, tearing out anything porous that touched it (drywall, insulation, carpet, sometimes subfloor), disinfecting the affected structure, and running air movers and dehumidifiers until moisture readings are back to normal. Biohazard work covers things like trauma scenes, hoarding situations, and unattended deaths, where the priority is safe removal and disposal of contaminated materials under health and safety rules, not just cleaning up visible mess.
We track 9 companies in Mississauga that handle this kind of work. When you're comparing them, a few things matter more than a polished website:
Our scores weigh response time, licensing and certification, equipment, and how companies actually handle documentation and insurance, based on the methodology described at /ranking-method/. For the full ranked list across all water damage restoration services in the city, see the best water damage restoration services in Mississauga.
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9 businesses, scored on recent reviews. The order weighs each business's overall score by how much of its reviewed work is sewage & biohazard cleanup, so a lower-scored specialist can rank above a higher-scored generalist.
When water or fire damage strikes, ONT Restoration typically responds within hours and handles mitigation with care. Reviewers consistently praise the speed of initial assessment, the professionalism of named technicians, and the thorough drying setup on-site. A small number report difficulty reaching the company initially, though most who connect say the team guides them through the repair and insurance process clearly.
The team consistently arrives quickly for emergencies, removes standing water, and explains each step without surprises. Reviewers note responsiveness is their strongest asset, with one office flood resolved in 47 minutes, and thorough drying that leaves basements properly restored.
Ten consecutive five-star reviews praise speed, professionalism, and quality across water damage, mold removal, and emergency work. Repeat customers cite fair pricing and a team that delivers on restoration and repairs without cutting corners.
Staff deliver fast, clear communication from first contact through project completion. Photos and daily updates keep owners informed; quotes are transparent and arrival times swift. Work spans mold removal, water damage, odor elimination, and deep cleaning, with particular strength in handling complex situations remotely or under urgent timelines. The team consistently earns trust through honest advice rather than overselling scope.
Five-star reviews across two years show consistent speed and professionalism. Reviewers praise the team's responsiveness to emergencies, clear pricing, careful handling of sensitive items, and ability to guide insurance claims. Work spans basement flooding, sewage cleanup, mold removal, and finishing touches like painting and flooring; customers note jobs completed on or ahead of schedule with thorough cleanup afterward.
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All three reviews reflect quick response, on-time arrival, and smooth handling of water and mold damage. Reviewers credit friendly staff, transparent pricing, and professional work across burst pipes, basement seepage, and leakage-related mold.
Reviewers consistently report fast response, professional work, and clear explanations from the crew. The business handles mold removal, water damage, sewage backup, and emergency repairs; multiple reviewers mention staff assistance with insurance claims and same-day availability.
Five recent one-star reviews report serious issues: delayed follow-up from staff, billing disputes, subcontractor damage to property and possessions, and conflicts with insurance company. Older five-star reviews praise quick response and quality work, but the weight of recent complaints about honesty and accountability creates substantial concern. Service quality appears inconsistent across branches and hinges on which technician shows up.
Not enough recent reviews yet to synthesise a reliable sentiment read for this business.
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Last updated 2026-08-12