Are your Sewage Cleanup services available in Hollis?

Yes, COS Water Damage Restoration provides round-the-clock Sewage Cleanup services directly in Hollis, NH.

How much does emergency service cost in Hollis?

We offer upfront, transparent pricing with no hidden fees for all service calls in Hollis.

Sewage Cleanup in Hollis, NH | 24/7 Local Service

Name: COS Water Damage Restoration
Telephone: +1-844-499-0972
Price range: $$

Why Choose Us

What Sets COS Water Damage Restoration Apart for Sewage Cleanup in Hollis

Sewage cleanup in Hollis is not a standard water damage job. The contamination levels, regulated disposal requirements, containment procedures, and sanitization standards that apply to Category 3 events are fundamentally different — and using a company without specific Category 3 training and equipment leaves your property and your household at risk.

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IICRC S520 Category 3

IICRC certification is the standard that defines whether a sewage cleanup was done correctly. Our Hollis team is certified. The difference is measurable.

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Regulated Disposal

Proper disposal is a regulatory requirement, not a premium upgrade. It's standard on every Hollis job.

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Hospital-Grade Sanitization

One application of sanitizer after a sewage event is not sufficient. Our protocol uses multiple applications with documented dwell times.

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Insurance & Air Quality Coordination

Our Hollis claim coordinators handle the insurance piece. We can coordinate clearance testing when it's required.

Services

Sewage Cleanup Services Our Hollis Team Performs

COS Water Damage Restoration handles the complete scope of Sewage Cleanup in Hollis — from containment and extraction through material removal, sanitization, structural drying, and rebuild. Category 3 protocols, start to finish.

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Containment Setup & Source Control

The first action our Hollis sewage crew takes on any Category 3 event is establishing negative-pressure containment — critical plastic sheeting barriers that prevent sewage contamination from spreading into unaffected areas of the property through airborne particles, foot traffic, and air circulation. Containment also controls odor migration within the property while remediation is underway. Simultaneously, we identify and coordinate the correction of the blockage or failure that caused the backup — whether that's a main line obstruction, a failed cleanout, or a sump failure — so that remediation isn't interrupted by a secondary event.

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Category 3 Extraction & Material Removal

Extracting Category 3 sewage water from a Hollis property requires specific PPE — full protective suits, respirators rated for biological hazard, and disposable boots — for every technician in the contamination zone. We use dedicated contaminated-water extraction equipment that is not shared with standard water damage jobs and is properly sanitized between uses. After extraction, all materials that contacted Category 3 water and cannot be decontaminated to a safe standard — carpet, pad, standard drywall, fiberglass insulation, and any non-cleanable surface materials — are removed as regulated waste, bagged in approved containers, and disposed of under NH biohazard material regulations.

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Multi-Phase Antimicrobial Sanitization

After material removal, every remaining structural surface — framing, subfloor sheathing, masonry, concrete, and any hard surface that contacted sewage water in your Hollis property — receives a multi-phase sanitization treatment using EPA-registered, hospital-grade antimicrobial and antifungal agents. The sanitization sequence includes spray application, documented dwell time, surface contact, and at minimum one additional application after the first dwell cycle. This is not a one-spray process. The S520 protocol our Hollis team follows is designed to address the pathogen load that Category 3 water deposits on structural surfaces.

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Odor Neutralization & Air Treatment

Category 3 sewage events leave odor-causing compounds embedded in structural materials, in the air space above the affected area, and — in HVAC systems — potentially distributed throughout the property. Our Hollis team uses hydroxyl generator technology and botanical-based counteractant treatments to neutralize sewage odor compounds in the air and on surfaces, not mask them. For properties where HVAC ductwork may have been exposed to Category 3 contamination, duct isolation and decontamination is included in our scope evaluation.

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Insurance & Backup Coverage Claims

Our Hollis claim coordinators have processed Category 3 claims across NH carriers. We know what gets approved on first submission.

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Post-Remediation Reconstruction

After Category 3 remediation is confirmed complete by instrument readings and — where required — by third-party clearance testing, our licensed Hollis reconstruction team rebuilds your property: new drywall, fresh insulation, flooring, paint, trim, and any affected cabinetry or millwork. All reconstruction is performed to the same documentation standard as the remediation phase, providing a complete recovery record from sewage event to finished property that your insurance carrier and any future property transaction will find clear and complete.

Professional Sewage Cleanup technician working in Hollis, NH

24/7 Emergency Sewage Cleanup experts in Hollis, NH

Our Process

How Sewage Cleanup Works in Hollis — Category 3 Protocol

Call — Biohazard Dispatch

Call +1-844-499-0972 and a live Hollis dispatcher answers — not a recording. Describe the situation; our dispatcher confirms the sewage backup details, dispatches the nearest Category 3-equipped crew, and confirms estimated arrival. Evacuate the affected area and prevent household members and pets from entering while we're en route.

Arrival — Containment First

Containment before contact. Source identified and addressed before cleanup proceeds.

Assessment & Written Scope

No extraction, no material removal before the written scope is reviewed and approved by you.

Remediation & Rebuild

From sewage event to finished property — documented, guaranteed, and handled by one company.

Reviews

Hollis Customers on Our Sewage Cleanup Service

★★★★★

"We have a young child and a dog and the moment the sewage smell hit I knew this was something I couldn't handle myself. COS Water Damage Restoration's Hollis team was there in under 60 minutes, contained the area so our family could stay in the upper floors, and handled every part of the cleanup in a way I trusted. The clearance testing they coordinated at the end gave me documented proof that the remediation was complete."

N. Beaumont

Verified Hollis, NH Customer

★★★★★

"The thing that stood out with COS Water Damage Restoration's Hollis sewage cleanup team was the containment setup — I've seen other companies skip it or do it loosely, and you can tell they don't understand why it matters. This team had proper negative-pressure containment up before they extracted a gallon of water. The two-phase sanitization after material removal, the hydroxyl generator running during drying, the final surface swab coordination — this was a Category 3 remediation done to the actual standard, not a watered-down version of it."

P. Osei-Bonsu

Verified Hollis, NH Customer

★★★★★

"I've used general contractors for water damage before with mixed results. After calling COS Water Damage Restoration for a sewage event in Hollis, I understand the difference between a certified Category 3 remediation team and a general restoration company that 'also does sewage.' The protocols aren't comparable."

L. Krishnamurthy

Verified Hollis, NH Customer

FAQs

Common Questions — Sewage Cleanup in Hollis

Why is sewage water treated as a biohazard in Hollis properties?

Sewage water — including backed-up drain water, raw sewage, and toilet overflow contents — is classified as Category 3 under the IICRC S500 water damage standard. Category 3 water is defined as grossly contaminated and contains pathogenic bacteria, viruses, parasites, and other biological agents at levels that pose a direct health risk to humans and animals. Contact without appropriate PPE, breathing air in an uncontained Category 3 space, and exposure of household members to inadequately remediated surfaces are all real health risks. This is why proper containment, full PPE, and compliant sanitization are non-negotiable steps in Hollis sewage cleanup — not optional upgrades.

What materials are removed versus saved during Sewage Cleanup in Hollis?

Under IICRC S520 Category 3 protocol, porous materials that contacted sewage water and cannot be decontaminated to a safe standard are removed as regulated waste. In a typical Hollis sewage event, this includes: carpet and pad (always), standard wallboard drywall that was submerged or splashed, standard fiberglass or cellulose insulation, and any other porous finish material that absorbed Category 3 water. Hard, non-porous surfaces — concrete, ceramic tile, metal framing, pressure-treated lumber — can typically be decontaminated in place using the sanitization protocol. Our Hollis project manager evaluates each material individually and documents the removal decision in the written scope.

Does homeowner's insurance cover sewage backup in Hollis?

Coverage for sewage backup events in Hollis typically depends on whether your homeowner's policy includes a backup coverage rider. Standard homeowner's policies generally exclude sewer and drain backup damage unless this specific rider is included. Backup coverage riders are relatively inexpensive to add and cover most drain backup events. Our Hollis claim coordinators review your policy details and document your claim to match your specific coverage terms — including the important distinction between a backup event and a sewer line failure, which may be covered differently.

Is clearance testing required after Sewage Cleanup in Hollis?

Third-party clearance testing — air quality and surface swab sampling performed by an independent industrial hygienist — is not universally required after sewage cleanup in Hollis, but it is available and appropriate in several situations: commercial properties with regulatory requirements, rental properties where a landlord needs documented proof of remediation for tenants, situations where immunocompromised individuals occupy the property, or any case where a client wants independent verification beyond our own completion documentation. We coordinate third-party clearance testing on request and can schedule it immediately after the final sanitization cycle.

How long does Sewage Cleanup take in Hollis?

A typical Hollis sewage cleanup project runs: Day 1 for containment, extraction, and material removal; Days 1-2 for sanitization cycle (multiple applications with documented dwell times); Days 2-6 for structural drying under daily monitoring; clearance testing coordination if needed (24-48 hours for lab results); and then reconstruction, which ranges from a few days to several weeks depending on the scope of material removed. Your Hollis project manager provides a realistic timeline at the initial assessment and updates it as the drying program progresses.

Can I stay in my Hollis home during sewage cleanup?

Whether you can remain in your Hollis home during sewage cleanup depends on the contamination zone and the containment configuration our team establishes. For events confined to a basement or a single room where negative-pressure containment can isolate the remediation area from the occupied portions of the home, remaining in place is often feasible. For events that affect living areas, bedrooms, or the main floor, temporary relocation is strongly recommended during the active remediation phase — typically 1-3 days. Our Hollis project manager evaluates the specific situation and advises on habitability at the initial assessment.

Service Area

Sewage Cleanup Coverage — Hollis and NH

COS Water Damage Restoration's certified Category 3 sewage cleanup team serves Hollis and surrounding communities throughout NH. Call +1-844-499-0972 to confirm same-day service at your address.

Offering top quality Sewage Cleanup services in Hollis, NH. Certified, licensed, and available 24/7.