Sewer Backup in Memphis: What to Do and Costs
Last updated: March 2026
Stop using every drain, toilet, and water-using appliance in the house. Do not flush. Do not run the dishwasher or washing machine. Each gallon used makes the backup worse. Get people and pets away from contaminated areas. Sewage (Category 3 black water) contains bacteria, viruses, and parasites that cause serious illness.
Sewer backups are one of the most common and damaging plumbing events Memphis homeowners face. The city's aging infrastructure, flat terrain, clay soil, heavy rainfall, and combined sewer system in older neighborhoods all contribute to a higher-than-average backup frequency. This guide covers what to do in the first hour, who is responsible, what cleanup and repair cost, and how to protect your home from future events.
For national sewer repair pricing, see our sewer line repair cost guide. For drain cleaning that may resolve less severe blockages, see our drain cleaning cost guide. For general Memphis plumbing costs, see our Memphis plumbing cost guide.
What to Do in the First Hour
- Stop all water use in the entire house. Do not flush any toilet, run any faucet, or use any drain-connected appliance.
- Keep everyone out of contaminated areas. Sewage is a biohazard. Children and pets especially should be kept away from affected areas.
- Do not try to clean it yourself with household mops, towels, or cleaning products. Category 3 sewage contamination requires professional biohazard equipment and licensed restoration personnel.
- Call MLGW at (901) 544-6549 to report the backup and request main line inspection. Ask for an incident report number. If the main is blocked, MLGW bears responsibility.
- Document everything with photographs and video before any cleanup. Capture all affected areas, the depth of backup, and material damage. Your insurance claim depends on this documentation.
- Call your homeowner's insurance company to report the event. Ask specifically whether your policy includes a sewer backup endorsement. File a claim before cleanup begins.
- Call a licensed plumber with sewer camera equipment to diagnose whether the blockage is in your lateral or the city main.
- Call a licensed water damage restoration company for cleanup if sewage has entered living spaces. Do not attempt DIY remediation of Category 3 contamination.
Health Hazards of Sewer Backup
Sewage backup is classified as Category 3 water damage (also called black water) by industry standards. This is the highest contamination category, indicating the presence of pathogenic bacteria, viruses, and parasites that pose serious health risks.
- Bacterial contamination includes E. coli, Salmonella, Shigella, and Campylobacter, all capable of causing severe gastrointestinal illness.
- Viral contamination may include Hepatitis A, norovirus, and rotavirus.
- Mold risk begins within 24 to 48 hours of water intrusion in Memphis's warm, humid climate. Mold remediation is significantly more expensive than prevention; rapid professional drying is critical.
- Structural damage from prolonged sewage saturation in subfloor materials, wall cavities, and insulation requires full replacement of affected materials, not just cleaning.
Do not use areas affected by sewage backup until professional remediation is complete and an air quality or surface testing confirms the space is safe. This is not excessive caution; sewer backup illness is a real risk, particularly for children, elderly residents, and anyone with compromised immunity.
Memphis Sewer Backup Costs in 2026
| Service | Memphis Cost | Notes |
|---|---|---|
| Emergency sewer lateral cleaning | $200 - $600 | Rodding or hydro jetting; may not find root cause |
| Camera inspection | $100 - $350 | Required before any repair decision |
| Tree root removal (mechanical) | $200 - $800 | Clearing root masses; temporary without lining |
| Hydro jetting (main lateral) | $240 - $720 | High-pressure pipe wall cleaning |
| Spot repair (localized damage) | $900 - $3,600 | Single section repair; excavation required |
| CIPP trenchless lining | $3,600 - $10,800 | Permanent root solution if pipe is structurally sound |
| Full sewer replacement | $4,750 - $19,000 | For collapsed or severely deteriorated laterals |
| Sewage cleanup / remediation | $2,000 - $10,000+ | Varies by affected area; separate restoration contractor |
Memphis sewer repair prices run about 8 percent below national averages due to lower regional labor costs. However, the high rate of sewer problems in older Memphis neighborhoods means competition for experienced sewer contractors can drive emergency prices up. Get a written estimate before authorizing work beyond emergency cleaning.
MLGW Responsibility vs Your Responsibility
Memphis Light, Gas and Water (MLGW) operates one of the largest combined public utilities in the United States. MLGW is responsible for the public sewer main under the street and the infrastructure up to the connection point at or near the property line. Everything from that connection point to your foundation, including the full length of your private lateral, is your responsibility.
| Infrastructure | Responsible Party | Action if Problem |
|---|---|---|
| Public sewer main (under street) | MLGW | Call (901) 544-6549; request main inspection |
| Connection at property line | Shared / MLGW | Call MLGW for inspection; document all findings |
| Private lateral (property line to house) | Homeowner | Licensed plumber; homeowner pays |
| In-house drain lines | Homeowner | Licensed plumber; homeowner pays |
Before accepting full financial responsibility for a sewer backup, call MLGW and document their response. If the public main was surcharging, MLGW may bear partial responsibility for backup damage in your home. Keep your MLGW incident report number and record the date and time of your call. If MLGW investigates and finds no main blockage, the problem is in your private lateral.
MLGW customer service: (901) 544-6549. Report sewer overflows affecting public areas through this same number or online at mlgw.com.
Memphis Neighborhoods Most Affected by Sewer Backup
| Neighborhood | Housing Era | Primary Risk Factors |
|---|---|---|
| Midtown Memphis | 1920s - 1940s | Original clay laterals, mature oaks and pecans, flat terrain |
| Cooper-Young | 1920s - 1940s | Clay tile pipe, combined sewer proximity, heavy tree canopy |
| Vollintine-Evergreen | 1920s - 1950s | Aging clay infrastructure, tree root intrusion, income-limited maintenance |
| Central Gardens | 1900s - 1930s | Some of the oldest residential clay infrastructure in the city |
| East Memphis | 1950s - 1970s | Transitional era pipe; mature tree canopy over aging laterals |
| Germantown | 1970s - 1990s | More modern infrastructure but large lots with mature trees |
| Whitehaven | 1950s - 1970s | Flat terrain drainage issues; some Orangeburg pipe in postwar construction |
| Areas near Nonconnah Creek | Various | Flood zone proximity; elevated backup risk during heavy rain events |
Memphis Sewer Pipe Types
Understanding what type of pipe is in your Memphis lateral directly affects what solutions are appropriate and how urgent the situation is.
- Clay tile (pre-1960 homes): Joint-intensive pipe prone to root intrusion and offset joints from soil movement. Cleaning provides temporary relief; CIPP lining is the best long-term solution for sound clay pipe. Collapsed sections require excavation and replacement.
- Orangeburg (1945-1975 homes): Compressed paper and pitch that deteriorates into an oval shape and eventually collapses. Memphis's postwar expansion in Whitehaven and parts of South Memphis used Orangeburg. If camera inspection reveals Orangeburg, plan for replacement regardless of current symptom severity.
- Cast iron: Durable but subject to internal corrosion and joint deterioration over time. Cast iron drain lines in older Memphis homes can last 50 to 100 years but should be camera-inspected.
- PVC (post-1980): Standard modern material; low root intrusion risk at joints. If your PVC lateral is backing up, the blockage is typically accumulated debris, not structural failure.
Preventing Future Memphis Sewer Backups
After clearing a backup, invest in prevention that reduces the risk of recurrence. The cost of annual preventive maintenance is a fraction of the cost of emergency response and remediation.
- Annual camera inspection ($100-$350) on any pre-1960 lateral identifies developing root intrusion, offset joints, and belly sections before they cause a backup. Early intervention costs far less than emergency response.
- Hydro jetting and root treatment after camera inspection cleans the full pipe diameter and removes root masses. Enzymatic root inhibitor treatment can slow regrowth after mechanical removal.
- CIPP pipe lining on clay tile laterals with chronic root intrusion eliminates all joints, permanently closing root entry points. This is the highest-value single investment for chronically affected homes.
- Backwater valve installation protects against rain-correlated surcharge backups. Essential for neighborhoods served by combined sewers.
- Sewer backup insurance rider ($40-$100/year) covers cleanup and property damage costs when prevention fails. In Memphis, this is not optional coverage.
Backwater Valve Installation in Memphis
A backwater valve is a one-way check valve typically installed on the main sewer lateral where it exits the foundation. During normal conditions, the valve stays open and allows waste to flow out. If the public sewer surcharges during heavy rain, the valve automatically closes, blocking sewage from entering through floor drains or basement fixtures.
Memphis homeowners in neighborhoods with combined sewers or near areas prone to flooding during heavy rain events should prioritize backwater valve installation. The valve costs $1,000 to $3,000 installed (depending on lateral depth and access) and requires a Memphis building permit. Many homeowners combine backwater valve installation with sewer camera inspection and hydro jetting as a package.
Contact your homeowner's insurance carrier before installation to ask about premium discounts for backwater valve documentation. Some carriers reduce sewer backup endorsement premiums when a valve is confirmed installed.
Insurance Coverage for Memphis Sewer Backups
Standard Tennessee homeowners insurance policies exclude sewer backup damage under the water damage exclusion provisions. However, a sewer backup endorsement, added to your policy for $40 to $100 per year, provides coverage for both property damage and cleanup costs up to your endorsement limit.
Recommended steps after any Memphis sewer backup, regardless of severity:
- Document all damage with photos and video before cleanup
- Call your insurer and ask specifically about your sewer backup coverage
- Get an MLGW incident report number if MLGW was involved
- Keep all receipts from cleanup, plumbing repair, and restoration work
- Do not begin cleanup until the insurer has confirmed coverage or adjusted the claim
- If coverage is disputed, contact the Tennessee Department of Commerce and Insurance
For comparison with sewer backup response in other cities with aging infrastructure, see our Chicago sewer backup guide, Nashville sewer backup guide, and Seattle sewer backup guide.
Frequently Asked Questions
Stop all water use in the house right away. Do not flush toilets, run dishwashers, do laundry, or use any drains. Every gallon that goes down any drain makes the backup worse. Get everyone out of areas where sewage is visible. Call MLGW at (901) 544-6549 to report the event and ask if the main sewer line is involved. Then call a licensed plumber with sewer camera equipment to diagnose whether the blockage is in your lateral or the city's main.
Emergency sewer lateral cleaning in Memphis costs $200 to $600. Camera inspection runs $100 to $350. If tree root removal is needed, add $200 to $800. Sewer lateral repair costs $900 to $3,600 for spot repairs and $4,750 to $19,000 for full replacement, depending on length and method. Sewage cleanup and professional remediation by a licensed restoration company costs $2,000 to $10,000 or more depending on the area affected. Always file your homeowner's insurance claim before cleanup begins.
MLGW (Memphis Light, Gas and Water) is responsible for the public sewer main running under the street. Your private lateral from your foundation to the main connection point is your responsibility. If a MLGW main blockage caused sewage to back up into your home, MLGW may bear responsibility for cleanup costs. Call MLGW at (901) 544-6549 and request that they camera-inspect the public main before authorizing private lateral repair. Get an MLGW incident report number. If the main was clear and the blockage was in your lateral, your homeowner's insurance or a sewer backup rider applies.
Standard Tennessee homeowners insurance policies typically exclude sewer backup damage. A sewer backup endorsement, available from most carriers for $40 to $100 per year, covers sewage cleanup and property damage up to policy limits (typically $5,000 to $25,000). Given Memphis's aging sewer infrastructure, flat terrain, and high rainfall, sewer backup coverage is one of the most cost-effective endorsements a Memphis homeowner can carry. Review your current policy declarations page and call your agent if you are unsure whether you have this coverage.
Midtown Memphis has some of the highest sewer backup risk due to original 1920s to 1940s clay tile laterals under mature oaks and pecans. Cooper-Young, Vollintine-Evergreen, and Central Gardens share this risk profile. East Memphis and Germantown have more modern infrastructure but mature tree canopy creates root intrusion risk. Whitehaven and South Memphis have aging combined sewer infrastructure. Low-lying areas near Nonconnah Creek and Loosahatchie River have additional flood-related backup risk during heavy rain events.
Memphis is remarkably flat, with most of the city sitting on the Chickasaw Bluffs above the Mississippi River floodplain. Flat terrain means gravity drainage in sewer pipes relies on precise pipe grading; any belly section (sag in the pipe) creates a standing water pool that catches waste and accelerates blockage. Combined with aging clay tile pipe in older neighborhoods and clay soil that retains moisture, flat-terrain drainage creates chronic slow-drain conditions that culminate in full backups. Camera inspections often reveal multiple belly sections in the same lateral.
Emergency extraction and initial sanitization of a small backup event (crawlspace or a portion of a basement) typically takes 1 to 2 days. Larger events with sewage on finished floors, walls, or multiple rooms can take 3 to 7 days for extraction, drying, and sanitization. Mold remediation, if needed after 24 to 48 hours of wet conditions, adds additional time and cost. A licensed water damage restoration company should handle sewage cleanup; Category 3 black water contamination requires professional biohazard handling, not DIY cleanup.
A backwater valve is a one-way check valve installed on the sewer lateral inside your crawlspace or basement. It allows normal outflow but automatically closes if the public sewer surcharges during heavy rain or a main blockage, preventing sewage from entering through floor drains or low-level fixtures. For Memphis homeowners in neighborhoods with combined sewer infrastructure or frequent rain-correlated backups, a backwater valve is the single most effective protection. Installation costs $1,000 to $3,000 and requires a Memphis permit.
Indicators that cleaning is not enough include: camera footage showing collapsed pipe, multiple offset joints, pipe out of round (often Orangeburg deformation), pipe that is more than 50 percent blocked by root masses that cannot be fully cleared by hydro jetting, or any section where bellying creates standing water that will always accumulate waste regardless of cleaning. Repeated cleanings more than twice in 12 months on the same lateral suggest a structural problem that cleaning cannot address. A camera inspection with footage you can review is the only way to make this determination accurately.
The City of Memphis entered into a consent decree with the EPA and Tennessee Department of Environment and Conservation requiring investment to reduce sanitary sewer overflows (SSOs). Memphis's collection system had documented SSO problems, and the consent decree requires ongoing infrastructure rehabilitation, capacity increases, and reporting. This project is long-term and ongoing. While it addresses public infrastructure, the private laterals connecting homes to the public system remain the homeowner's responsibility and are not covered by the consent decree upgrades.
Related Guides
- Sewer Line Repair Cost Guide
- Drain Cleaning Cost
- Memphis Plumbing Cost Guide
- Sewer Backup Chicago
- Sewer Backup Nashville
- Sewer Backup Seattle
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