If sewage is coming up through a drain, toilet or floor drain, stay out of the affected area and call our 24/7 line. Until the crew arrives, send kids and pets elsewhere, stop flushing and running taps, and skip the towels. Contaminated water spreads on shoes and hands, and every trip through the room carries it farther.
Sewage backup cleanup is the removal, containment and sanitizing of Category 3 water, the most contaminated class under ANSI/IICRC S500. It is a different job from cleaning up a clean supply leak, and it ends with discarding some materials that look salvageable.
Safety first
Stay out of the water. Do not walk through it, and do not touch wet items barefoot or with bare hands. With a flooded basement, the breaker is off limits unless the panel is dry and reachable without wading. If getting there means stepping into the water, leave the panel alone and report any electrical or gas hazard to the utility or 911 first.
Contaminated water can carry bacteria that cause illness, so keep food, dishes and bedding out of the area. For any symptom questions, speak with a physician. We make no medical claims.
Sewage backup emergency: after-hours and same-day help
A backup does not wait for business hours. It often shows up on a weekend evening after the household has been running laundry and showers, which puts the most load on the line. Calls to the 24/7 line go to dispatch at any hour, with same-day response when available.
On arrival, we first look at the extent, then set up containment so the rest of the house stays clean. The scope and price conversation happens before the first hose comes off the truck.
Water still spreading? The 24/7 emergency line is open right now.
☎ Call (516) 845-9582Gurgling drains, floor drain overflow and a sewer smell
Warning signs often show up before the water does. Most point to a sewage backup in the making:
- Toilets or tubs gurgle when another fixture drains.
- A basement floor drain bubbles, rises or smells.
- Water backs up in the lowest fixture when the washer drains.
- Several fixtures drain slowly at once, not just one.
- A sewer smell rises from a drain that was fine yesterday.
- Wet spots or stains appear near the floor drain or cleanout.
Main or lateral: who fixes the cause
The pipe from your house to the street is your lateral, and the pipe in the street is the municipal main. If several neighbors have the same problem, the main is likely blocked and the sewer authority should be called. If only your house is affected, a plumber should camera the lateral for roots, collapse or grease.
Port Washington has several incorporated villages as well as the unincorporated area, so the authority differs by street. To learn who maintains the sewer line in front of your house, call the Town of North Hempstead or your village hall, whichever covers your address.
How we contain, remove and sanitize
Set containment
Plastic sheeting and negative air machines with HEPA air scrubbers keep contaminated air and dust inside the work zone.
Extract the liquid
Extraction units remove standing sewage. See water extraction for the equipment.
Remove porous materials
Carpet, pad, insulation, drywall and particleboard that absorbed Category 3 water are cut out and bagged for disposal.
Clean and sanitize
Remaining hard surfaces and framing are cleaned, then treated with an antimicrobial product.
Dry and verify
Drying gear runs until moisture meter readings in the affected framing come down to normal.
Why porous materials are discarded
Carpet, padding and drywall soak up contaminated water and hold it deep in the fibers. Surface cleaning cannot reach what is inside, so S500 guidance treats them as non-salvageable after Category 3 contact. Hard materials such as sealed concrete, tile and framing can be cleaned and sanitized instead.
This is why a sewage job has more demolition than a clean water leak. If you have dealt with a flooded basement before, basement water damage cleanup shows the difference.
Repair options and their trade-offs
| Choice | Advantage | Drawback |
|---|---|---|
| Clean and keep hard flooring | Saves the finish if sealed and intact | Grout and seams need close checking |
| Cut drywall above the water line | Removes wicking damage | Larger rebuild and paint area |
| Replace carpet and pad | Removes the contamination source | Cost of new flooring |
| Plumber repairs the lateral first | Stops repeat backups | Excavation may be needed |
Cost factors for sewage cleanup
Category 3 pricing differs from clean water because of the protective gear, containment and disposal. Other factors are the area affected, the amount of porous material that must go, the days of drying equipment and the rebuild scope. A small toilet overflow in a bathroom is a different job from a basement full of effluent.
Expect the scope and price spelled out before cleanup starts. If the water reaches rising levels outside, it may be a flood instead, covered under flood damage restoration.
Insurance and the back-up endorsement
A sewer or drain back-up is not flood, and DFS notes that cover for it usually depends on a water back-up and sewage endorsement added to the base policy. Check your policy for that wording and ask your insurer what it covers. Photograph the damage before cleaning and keep receipts for emergency work.
Nearby Roslyn homeowners face the same question. Our page on Roslyn water damage restoration explains how we work there, and the policy guidance applies the same way.
Frequently asked questions
Do you handle sewage backup emergencies at night or on weekends in Port Washington?
Yes. Dispatch handles back-up calls at any hour. Stay out of the area and keep the household away from the water until we arrive.
Is it safe to clean up sewage myself?
We advise against it. Category 3 water carries contaminants, and porous materials need removal and containment that household cleaning cannot provide.
How do I tell whether the problem is the main or my lateral?
If neighbors have the same trouble, call the sewer authority. If only your property is affected, call a plumber to camera the lateral.
Will carpet be saved after a sewage backup?
Generally no. Carpet and pad that absorb Category 3 water are discarded. Hard sealed surfaces can often be cleaned.
Does homeowners insurance cover sewer back-up?
Frequently that depends on a back-up and sewage endorsement being on the policy. Your insurer can confirm whether the endorsement is on your policy. We make no promise about approval.
Do you do the plumbing repair?
No. A plumber clears or repairs the line. We handle the contaminated water and the building materials.
Ready to talk it through? Call the 24/7 line.
☎ Call (516) 845-9582