🚨 Sewage backup in your property? Do not enter. Call (480) 204-9035) — certified biohazard response 24/7

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Category 3 Biohazard Certified

24/7 Response

Sewage Backup. Do Not Enter. Call Us First.

Sewage backup is not a cleanup job you handle yourself. Category 3 black water contains dangerous bacteria, pathogens, and biohazards that pose serious health risks without proper protective equipment and certified remediation protocols. RCS Builders provides professional sewage backup cleanup and complete property restoration across Greater Phoenix — safe containment, full sanitization, structural drying, and total rebuild back to pre-loss condition.

Category 3 Biohazard Certified IICRC Certified Xactimate Estimating Licensed & Insured 24/7 Emergency Response

⛔ Keep People and Pets Out of the Affected Area

Category 3 sewage water contains E. coli, salmonella, hepatitis A, norovirus, and other dangerous pathogens that can cause serious illness through skin contact, inhalation, or ingestion. Do not attempt to clean up sewage backup with household supplies — bleach and mops do not eliminate biohazard contamination from porous materials. Clear the area, close doors to contain it, and call RCS Builders immediately. We arrive in full PPE and handle every step safely.

Category 3

Most Dangerous Water Classification

100%

Porous Materials Must Be Removed

24–48hr

To Mold in Phoenix Summer Conditions

Multiple

Dangerous Pathogens in Sewage Water

0

Safe DIY Options — Call Certified Pros

Why This Is Not a Standard Water Damage Event

Sewage Backup Requires a Completely Different Approach Than Water Damage

Standard water damage protocols do not apply to sewage backup. The contamination classification changes everything — what materials can be saved, how the space is treated, what PPE is required, and how the property is cleared for reoccupation.

01
Category 3 — Grossly Contaminated

Sewage water is classified as Category 3 — the highest contamination level in the restoration industry. This classification means the water contains harmful microorganisms that pose direct health risks. All porous materials in contact must be removed — there is no safe drying protocol for contaminated porous material.

Highest Risk Level

02
Porous Materials Cannot Be Saved

Drywall, insulation, carpet, wood flooring, baseboards, and cabinetry that have contacted sewage water must be removed and disposed of as contaminated waste — not dried and left in place. Any contractor who tells you otherwise is not following IICRC S500 standards.

Full Removal Required

03
Full PPE Required Throughout

Our technicians work in full protective equipment — N95 or higher respirators, disposable suits, gloves, and eye protection — from initial entry through final clearance. No exceptions. This is non-negotiable for Category 3 events.

Safety Protocol

04
Antimicrobial Treatment of All Surfaces

Every structural surface that contacted sewage — concrete slab, framing, block walls, subfloor — is treated with EPA-registered antimicrobial agents after material removal. This eliminates pathogen contamination from hard surfaces that remain.

Certified Treatment

05
Clearance Testing Before Rebuild

Before any new materials go in, we coordinate post-remediation clearance testing to verify the space is safe for reoccupation and rebuild. We do not start reconstruction until clearance is confirmed.

Verified Safe

06
Commercial Requires Health Authority Coordination

In commercial settings, restaurants, medical facilities, and multifamily properties, sewage events may require notification to Maricopa County Environmental Services or the Arizona Department of Environmental Quality. We help you navigate these requirements.

Commercial Compliance

Our Remediation Process

How We Handle Sewage Backup — Every Step, In Order

Sewage cleanup cannot be rushed or cut short. Every step in this process exists for a specific safety reason. Here is exactly what we do — and why.

Step 1

Containment

Immediately upon arrival we establish containment barriers to prevent cross-contamination from affected areas to clean areas. Negative air pressure may be established in severe events to prevent airborne pathogen spread.

Step 2

Category Assessment

We confirm water category and contamination extent. This determines the full scope of material removal, treatment protocols, and documentation requirements for your insurance claim.

Step 3

Sewage Extraction

Contaminated water extracted using specialized equipment designated for Category 3 events. All equipment is decontaminated after each use and not cross-utilized with clean water jobs.

Step 4

Removal of All Contaminated Porous Materials

Every porous material that contacted sewage water — drywall, insulation, carpet, flooring, baseboards, cabinetry — removed and disposed of as contaminated waste. This step is non-negotiable under IICRC S500 standards regardless of what materials appear on the surface.

Step 5

Antimicrobial Treatment of All Hard Surfaces

Concrete slab, framing, block walls, and all remaining hard surfaces treated with EPA-registered antimicrobials formulated for Category 3 contamination. Multiple applications where indicated.

Step 6

Structural Drying

After extraction, material removal, and antimicrobial treatment, structural drying begins. Dehumidifiers and air movers run until all remaining structural materials reach acceptable moisture content. Daily monitoring and written logs throughout.

Step 7

Post-Remediation Clearance Testing

We coordinate third-party clearance testing to verify the space is safe before reconstruction begins. We do not proceed to rebuild without confirmed clearance — this protects you, your family, and your insurance claim.

Step 8

Full Rebuild

New drywall, insulation, flooring, cabinetry, baseboards, and paint — completely rebuilt to pre-loss condition. All materials are new. Code compliant. Final walkthrough with your project manager before we close.

Common Causes in Phoenix

The Most Common Sewage Backup Scenarios We Respond to in the Valley

🌳

Tree Root Infiltration

One of the most common causes in older Phoenix neighborhoods — particularly central Phoenix, Tempe, and Mesa. Mature trees send roots into aging clay or cast iron sewer lines seeking moisture. Root infiltration causes partial or complete line blockage that eventually backs up into ground-floor drains.

🏙️

Municipal Sewer Line Blockage

Main sewer line blockages in the city system push sewage back through the lowest drain points in connected properties — typically ground-floor toilets, shower drains, and floor drains. These events can affect multiple properties simultaneously.

🍳

Grease Buildup in Drain Lines

Extremely common in restaurants and food service operations. Grease accumulates in drain lines over time and eventually causes complete blockage. Kitchen floor drains and prep sink drains are the most common backup points.

🌊

Monsoon Season Sewer Surcharging

Intense monsoon rainfall can overwhelm Phoenix's combined sewer infrastructure, causing sewer lines to surcharge — pushing sewage back up through floor drains and low-point fixtures in properties connected to affected lines.

🏚️

Aging Sewer Lines

Phoenix's older housing stock has deteriorating clay and cast iron sewer lines that collapse, offset, or develop root intrusion over time. These aging lines fail progressively — often with repeated backup events before the root cause is addressed.

🚽

Toilet & Drain Blockages

Severe toilet or drain blockages that aren't cleared quickly can cause sewage overflow into bathrooms and adjacent spaces. While smaller in scale than main line events, Category 3 protocols still apply to any sewage water contact with porous materials.

🏘️

Multifamily Main Line Failures

Sewage main line failures in apartment complexes and multifamily buildings can affect multiple units simultaneously — particularly ground-floor and basement units. We coordinate with property managers and multiple insurance carriers on large multifamily sewage events.

⚙️

Septic System Failures

Properties in outlying Valley communities — parts of Queen Creek, San Tan Valley, Cave Creek, and Carefree — use septic systems rather than municipal sewer. Septic failures that back up into the structure are treated under the same Category 3 protocols.

Rebuild Scope

Everything Removed Gets Replaced — Complete Rebuild After Sewage Remediation

Because all porous materials must be removed in a sewage event, the rebuild scope is typically more comprehensive than standard water damage. Here's everything we replace.

Structural & Systems
  • Drywall — full removal and replacement from floor to flood line or higher
  • Insulation — complete removal and replacement
  • Subfloor materials where applicable
  • Wall framing treatment and replacement where indicated
  • Ceiling materials if contamination reached upward
Finishes & Fixtures
  • All flooring — tile, hardwood, LVP, carpet
  • Baseboards and interior trim — full replacement
  • Kitchen and bathroom cabinetry where affected
  • Interior doors and frames where affected
  • Paint — stain-blocking primer and matched finish
  • Final punch list and walkthrough

Sewage Backup Coverage — What You Need to Know

Sewage backup coverage varies more than standard water damage coverage. Most standard homeowner's policies require a specific sewage backup endorsement (rider) for coverage — check your policy. Commercial property policies typically include it. We help you identify your coverage before filing and document the event correctly for whichever carrier is involved. Sewage backup claims require more thorough documentation than standard water damage — we prepare complete packages that hold up under adjuster review.


Important coverage note: If you don't have a sewage backup rider on your homeowner's policy, the restoration costs may fall outside coverage. Call your agent before filing to confirm. We help you understand your options regardless of coverage status.

  • Coverage identification before claim filing
  • Complete Category 3 event documentation
  • Xactimate estimates for carrier submission



  • Direct adjuster communication
  • Supplement requests when scope is underpaid
  • Works with standard and commercial carriers

Who We Help

Sewage Backup Response for Every Property Type

🏠 Single Family Homes

🏘️ Townhomes & Condos

🍽️ Restaurants & Food Service

🏥 Medical & Dental Offices

🏪 Retail & Commercial

🏗️ Apartments & Multifamily

🏘️ HOA Communities

🏭 Warehouses & Industrial

🐾 Veterinary Clinics

🏫 Schools & Daycares

Client Stories

Real Sewage Backup Jobs. Handled Correctly.

★★★★★

"We had black water come into the master bathroom from a backed-up line. RCS remediated and rebuilt everything. They were thorough, professional, and handled the insurance completely."

David K. — Seville, Gilbert AZ

Category 3 · Bathroom · Full Rebuild

★★★★★

"The laundromat I manage flooded after a drain backup. RCS worked overnight to extract, sanitize, and re-open our most-used area the next morning. Incredible response time."

Kim L. — Phoenix, AZ

Commercial · Overnight Response

★★★★★

"Our restaurant had a kitchen drain line backup that was a mess. RCS arrived fast, contained everything, handled Maricopa County coordination, and rebuilt the kitchen properly."

Terry N. — San Tan Valley, AZ

Restaurant · Grease Backup · Commercial

Questions & Answers

Sewage Backup Cleanup —

Frequently Asked Questions

  • Can I clean up sewage backup myself?

    No — and we strongly advise against it. Category 3 sewage water contains dangerous pathogens that cause serious illness through skin contact, inhalation, and ingestion. Household cleaning products do not eliminate biological contamination from porous materials. Without proper PPE and certified remediation protocols, you risk serious health consequences and will likely void your insurance claim by disturbing the damage scene before documentation.

  • Does homeowner's insurance cover sewage backup?

    Most standard homeowner's policies require a specific sewage backup endorsement or rider for coverage — it is not automatically included in a base policy. Commercial property policies typically include it. Check your policy or call your agent before filing. We help you identify your coverage and document the event correctly regardless of coverage status.

  • Why do all the porous materials have to be removed — can't they just be cleaned?

    No. Porous materials — drywall, insulation, carpet, wood — absorb contaminated water into their structure at a microscopic level that surface cleaning cannot reach. Leaving contaminated porous material in place creates ongoing health risk and mold growth. IICRC S500 standards — the industry standard your insurance carrier references — require removal of all porous materials in contact with Category 3 water. Any contractor who offers to clean and dry sewage-affected drywall instead of removing it is not following proper protocols.

  • How long does sewage backup cleanup and rebuild take?

    Remediation — containment, extraction, material removal, antimicrobial treatment, and drying — typically takes 3–5 days. Clearance testing adds 1–2 days. Rebuild after clearance generally takes 1–2 weeks for residential properties depending on scope. Total time is typically 2–3 weeks from first call to completed rebuild.

  • Do you need to notify anyone when there's a sewage backup?

    For residential events, notification to health authorities is typically not required. For commercial properties — particularly restaurants, medical facilities, and multifamily buildings — Maricopa County Environmental Services or the Arizona Department of Environmental Quality may need to be notified. We help you determine what's required for your specific property type and coordinate those notifications.

  • The sewage only affected a small area — do full remediation protocols still apply?

    Yes. The extent of the event doesn't change the category of contamination. Even a small toilet overflow that affected a few square feet of bathroom floor requires Category 3 protocols for the materials in contact. The scope of removal may be limited, but the protocol is the same regardless of size.

  • Can the smell be fully eliminated after sewage backup?

    Yes — when remediation is done correctly. The odor from sewage backup is eliminated by removing all contaminated porous materials, treating all hard surfaces with antimicrobials, and completing structural drying. Properties where odor persists after "cleanup" typically have contaminated material that wasn't fully removed or inadequate antimicrobial treatment. We address the source — not the symptom.

  • We had sewage backup in a multifamily building affecting multiple units — can you handle that scale?

    Yes — we handle large multifamily sewage events regularly. We coordinate with property managers, communicate with affected tenants, work with multiple insurance carriers simultaneously, and have the crew capacity to address multiple units efficiently. We understand the urgency of protecting tenant safety and minimizing displacement time.

Also dealing with mold after sewage backup? See our Mold Remediation page. For general water damage restoration, visit our Water Damage Restoration hub. Commercial property managers — see our Commercial Water Damage page for large-scale event response.

Service Area

Certified Sewage Backup

Response Across Greater Phoenix

Based in Tempe. Certified Category 3 biohazard response across all of Maricopa County — 24/7 including weekends and holidays.

San Tan Valley

Paradise Valley

Fountain Hills

Apache Junction

Sun Lakes

Peoria

Avondale

Goodyear

Surprise

Maricopa

Gold Canyon

Carefree

Ahwatukee

Ocotillo

Arcadia

Cave Creek

Phoenix

Tempe

Chandler

Mesa

Gilbert

Scottsdale

Queen Creek

Laveen

Glendale

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Sewage Backup.

Clear the Area.

Call Right Now.

Do not attempt to clean this up yourself. Category 3 sewage water is a certified biohazard. RCS Builders arrives in full PPE, contains the affected area, extracts and removes all contaminated materials safely, and takes your property all the way to a fully rebuilt, cleared, and safe space.

(480) 204-9035

Available 24/7 · Category 3 Certified · Greater Phoenix Valley · Licensed & Insured