Curtis Teets · 30-year Columbus restoration veteran.
Sewage Odor Removal
Columbus, Ohio
Still smelling sewage after a cleanup? The water company left, the plumber says everything’s clear — and the smell is still there. That’s not a plumbing problem. It’s hydrogen sulfide embedded in your walls, subfloor, and HVAC. iDry Columbus has been solving this for Columbus homeowners for 30 years — including the neighborhoods where Columbus’s combined sewer infrastructure makes this a seasonal reality.
Sewage Smell vs. Sewer Gas — What You’re Actually Dealing With
Sewer gas enters through dry P-traps, blocked vents, or cracked lines — even without a backup. That’s a plumbing problem. Post-backup sewage odor means Category 3 black water saturated your structural materials. That’s a restoration problem, and cleanup crews don’t fix it.
Both smell like rotten eggs. Both involve hydrogen sulfide. But they have entirely different causes, different scopes, and different solutions. Getting this wrong means calling the wrong company, spending money twice, and still living with the smell.
iDry Columbus starts every sewage odor call by identifying which problem you actually have — before any treatment begins.
Who You Need — and Why It Matters
- Active backup or sewage overflow right now
- Slow drains or gurgling without prior backup
- Smell in one fixture only — sink, toilet, or specific drain
- No water damage — smell started gradually
- Floor drain unused for weeks (dry P-trap)
- Plumber says plumbing is clear — smell persists
- Smell came after a backup and cleanup was done
- Odor returns when heat or HVAC runs
- Sewage reached carpet, drywall, or subfloor
- Columbus CSO event — basement flooded in spring rain
Had sewage cleanup done and still smell it weeks later? That’s exactly our work. See our sewage backup cleanup page for active-backup emergency response.
How iDry Columbus Eliminates Sewage Odor
Six steps. Every sewage odor job in Columbus follows this sequence — from single-room thermal fogging to full basement structural decontamination with HVAC scope.
Source Identification & H₂S Mapping
We locate the contamination source using thermal imaging, moisture meters, and sewer gas detection. Sewer gas infiltration and post-backup structural contamination look identical but require different solutions. We identify which problem you have before any treatment begins.
Containment & Category 3 Biohazard Setup
Physical barriers and negative air pressure prevent odor compounds and contaminated particulates from spreading to clean areas of your home during treatment. Sewage is Category 3 black water — we treat it with the protocols it requires.
EPA-Registered Antimicrobial Treatment
Category 3 black water carries E. coli, hepatitis, and salmonella. Before fogging begins, EPA-registered antimicrobials are applied to all affected surfaces and materials — targeted treatment where contamination is confirmed, not a spray-down of every surface.
Thermal Fogging & Chlorine Dioxide Application
Thermal fogging penetrates wall cavities, subfloor gaps, and porous materials where sewage odor compounds embed. Chlorine dioxide (ClO₂) neutralizes hydrogen sulfide and organic sulfur compounds at the molecular level — not masking the odor, eliminating it.
HVAC Assessment & Decontamination
Sewage gases and particulates enter HVAC through floor registers and return vents during backups — then the system recirculates the odor to every room. We inspect air handlers, evaporator coils, and ductwork, and treat where contamination is confirmed. See our HVAC mold and odor removal page.
Air Quality Verification & Prevention Plan
Post-treatment verification includes a warm and humid condition test — the conditions that reveal embedded odor that surface testing misses. We walk you through backflow valve options, Project Dry Basement program resources, and P-trap maintenance schedules.
Most Restoration Companies Don’t Know What a CSO Event Is. We Do.
Columbus runs a combined sewer system across large portions of the city — a single underground pipe carrying both stormwater and raw sewage. When spring rains overwhelm the system, the City of Columbus documents Combined Sewer Overflow (CSO) events where stormwater forces sewer content back through basement floor drains and foundation cracks.
German Village, Clintonville, Italian Village, Short North, Victorian Village, and Franklinton are all in combined sewer territory. A Clintonville homeowner smelling sewage every April is likely dealing with a recurring CSO event — not a failing sewer line. That changes the conversation with your insurer, your plumber, and the scope of treatment required. A national franchise crew doesn’t know this. They dispatch a generic team, do surface cleanup, and leave.
iDry Columbus knows the Columbus infrastructure. We know which neighborhoods are on combined sewers, which spring conditions trigger CSO events, and how the City’s Project Dry Basement program subsidizes backflow valve installation to prevent recurrence. That’s what 30 years of Columbus work looks like.
H₂S Doesn’t Just Smell Bad. It Embeds in Materials and Recirculates.
Hydrogen sulfide — the rotten-egg component of sewage gas — is produced by anaerobic bacteria breaking down organic matter. At low concentrations it causes headaches and nausea. At moderate levels, olfactory fatigue sets in: you stop noticing it, but it’s still there and the health risk remains.
H₂S and other organic sulfur compounds bond to porous materials at the molecular level. Surface cleaning moves visible contamination but doesn’t reach odor compounds inside drywall, carpet padding, subfloor, or HVAC cavities. Heat and humidity release them again — which is why the smell returns every summer or every time your furnace runs.
What Sewage Odor Removal Costs in Columbus, Ohio
Cost is driven by how deep the contamination has penetrated, which materials are affected, and whether HVAC decontamination is required. Columbus CSO-related jobs often involve larger basement areas and recurring contamination — which changes the scope significantly compared to a single-room backup event.
The only accurate number comes from an in-person assessment. We provide that for free.
| Scope | Typical Range | Key Factor |
|---|---|---|
| Single-area thermal fogging + air treatment | $400–$900 | One room, no structural material saturation |
| Basement or multi-material treatment | $900–$2,500 | Carpet, drywall, subfloor affected — CSO typical scope |
| Structural encapsulation + deep remediation | $1,500–$4,500 | Odor in wall cavities, multiple materials, mold present |
| HVAC decontamination add-on | $400–$1,200 | Air handler, coils, ductwork contaminated from backup |
Will Insurance Cover It?
Ohio homeowners insurance typically covers sewage odor removal when tied to a covered backup or water damage event. What that means in practice:
- Sudden blockage backup → usually covered
- CSO event (city infrastructure) → depends on policy; some require separate flood coverage
- HVAC decontamination from covered backup → typically covered
- Odor from previous unreported event → may be excluded
- Gradual seepage or deferred maintenance → generally excluded
iDry Columbus provides complete photo documentation, odor source mapping, written scope, and moisture readings — the exact materials Ohio insurance adjusters require.
Call to Discuss Your ClaimEvery Cleanup Company Handles Sewage Backup. Almost None Handle What Comes After.
Chlorine Dioxide Treatment
ClO₂ penetrates wall cavities, subfloor gaps, and HVAC cavities where standard spray treatments can’t reach. It neutralizes H₂S at the molecular level. Most Columbus companies don’t offer this — we built our sewage odor process around it.
Columbus CSO Infrastructure Knowledge
We know which Columbus neighborhoods run combined sewers, which spring conditions trigger CSO events, and how the City’s Project Dry Basement program works. A Clintonville April backup and a Westerville August backup are different problems requiring different conversations.
HVAC Decontamination Included in Every Scope
Every sewage odor assessment includes an HVAC check. If the system is contaminated — air handler, coils, ductwork — we treat it as part of the scope, not as a separate upsell call.
Insurance-Ready Documentation
Photo documentation, odor source mapping, written scope, and moisture readings — the exact format Ohio insurance adjusters need. Thirty years working alongside Ohio adjusters taught us what documentation accelerates a claim.
24/7 Emergency Response
Strong H₂S concentration is a health risk. We’re available around the clock for Columbus metro sewage emergencies and give you immediate ventilation and safety guidance while en route.
Sewage Odor Removal Across Columbus & Central Ohio
Different Columbus neighborhoods present very different sewage odor challenges. Combined sewer infrastructure, housing age, and proximity to the Scioto River corridor all shape what the problem looks like — and what the fix requires.
Trusted by Columbus Homeowners
Real results from real customers across Central Ohio
“Honest people and excellent service. I cannot recommend this company highly enough! Thankfully, no further water intrusion or mold was found, but I have now found a company that I trust in a very reputable way.”
“We had 3 different companies come out. The quote was free, they were right on time and super communicative! Cathy personally called me throughout the process and kept me updated every step of the way. They went well above and beyond my expectations.”
“We called iDry for a home inspection before purchasing. Curtis is exceptionally knowledgeable about mold prevention and safety, and he was incredibly helpful. It is rare to find a service this outstanding. I highly recommend this business.”
Related Restoration Resources
Sewage odor is often part of a larger picture. Start with the service most relevant to your situation.
Active backup or overflow right now? Emergency extraction, Category 3 biohazard sanitization, and documentation for your insurance claim. 24/7 response.
Sewage backup creates the moisture conditions for mold remediation within 24–48 hours. If your backup was more than two days ago, mold is a near-certainty without remediation.
Sewage gases contaminate HVAC systems through return vents and floor registers during backups. The system then recirculates the odor to every room. Full HVAC decontamination scope.
Pet urine and sewage odor share the same structural contamination mechanism — compounds embedded in porous materials that return with heat and humidity. Same thermal fogging approach.
Sewage Odor Removal FAQs — Columbus, Ohio
Why does my house still smell like sewage after cleanup?
Is sewage smell dangerous in a house?
Why does my Columbus basement smell like sewage when it rains?
How long does sewage smell last in a house?
Should I call a plumber or a restoration company for sewage smell?
What causes sewer gas smell in a Columbus home?
Can sewage odor get into my HVAC system?
How much does sewage odor removal cost in Columbus?
Does sewage odor go away on its own?
Will homeowners insurance cover sewage odor removal in Columbus?
Request Your Free Sewage Odor Assessment
Free assessment — no obligation. If you have an active backup or strong H₂S smell, calling is fastest: 614-810-0000.