Why Sewer Backups Are So Common in New Jersey
New Jersey has a higher rate of sewer backup incidents than most states, and it's not random. The combination of dense older housing stock (Bergen County, Passaic County, Essex County, and Hudson County have millions of homes built between 1920 and 1970), aggressive tree canopies, and aging municipal sewer infrastructure creates conditions that make sewer backups a regular event for thousands of NJ homeowners every year.
Understanding the most common causes — and which are most prevalent in your neighborhood — is the first step toward prevention and faster action when a backup occurs.
1. Tree Root Intrusion (The #1 Cause in NJ)
Tree root intrusion is the leading cause of sewer line failures in North Jersey's older neighborhoods. Silver maples, oaks, willows, and elms — the trees that line streets in Garfield, Lodi, Clifton, Paterson, Teaneck, and dozens of other NJ towns — have aggressive root systems that detect moisture from sewer pipe joints from remarkable distances.
Once roots find the hairline cracks and mortar gaps in aging clay tile pipe, they grow in and expand aggressively. A small root infiltration can completely fill a 4-inch sewer lateral within 2–3 years. As roots accumulate, they trap solid waste passing through the line — building toward a complete blockage.
Prevention: Annual or bi-annual hydro jetting in older homes near large trees. Camera inspection to monitor pipe condition. Trenchless lining to seal entry points permanently.
2. Aging or Deteriorated Sewer Pipe
The majority of homes built in NJ before 1970 have clay tile sewer laterals — individual pipe sections roughly 24 inches long with joints every two feet. Over 50–80 years, these joints shift, crack, and separate. In many cases, the pipe itself fractures from ground movement and frost heave.
Orangeburg pipe — a compressed paper and tar material installed from the 1940s through the 1970s — is even more problematic. It absorbs moisture, deforms under ground pressure, and eventually collapses entirely. In our experience serving Hackensack, Paramus, Ridgewood, and similar post-war suburbs, Orangeburg failure is one of the most common causes of sudden complete backups in 50–70 year old homes.
Prevention: Camera inspection of any home built before 1975 that hasn't been scoped. Proactive pipe lining before failure occurs.
3. Grease Accumulation
Cooking grease — from bacon, ground beef, frying oil, butter, and other fats — flows freely when hot and immediately begins to solidify as it cools inside your drain lines. Over years of regular kitchen use, layers build up on the interior pipe walls, narrowing the passage available for waste water.
Grease clogs are especially common in older NJ homes with smaller-diameter drain lines, in multi-family buildings where multiple kitchens share a single lateral, and in older multi-family homes with shared laterals. Once a grease layer is established, solid waste catches on it easily — building to a backup much faster than a clean pipe would allow.
Prevention: Never pour grease down any drain. Use a sink strainer. Annual kitchen drain cleaning for homes with heavy cooking use.
4. Flushed Non-Flushable Materials
"Flushable" wipes are not flushable. This is one of the most thoroughly documented plumbing industry facts — and one of the most consistently ignored consumer behaviors. Unlike toilet paper, which breaks down within seconds of water contact, wet wipes retain their structure for hours or days. They accumulate at pipe bends, at joint offsets, and in low-velocity sections of your sewer line until they create a solid blockage.
Paper towels, cotton pads, dental floss, and hygiene products cause the same problem. The only thing that should be flushed in a NJ home's toilet is human waste and toilet paper — period.
Prevention: Education. No exceptions.
5. Municipal Sewer Surcharging
Heavy rainfall events — increasingly common in New Jersey — can overwhelm municipal combined sewer systems, causing the public main to surcharge (fill beyond capacity). When that happens, sewage is pushed backward through the lowest connection points in the system — often floor drains and basement toilets in older NJ homes.
This type of backup isn't caused by anything inside your house. The fix is a backwater valve — a one-way check valve installed in your lateral that prevents surcharge from backing up into your home even when the municipal system is overwhelmed.
Prevention: Backwater valve installation. Sump pump system for basement protection.
6. Pipe Bellies and Low Points
A pipe belly is a section of sewer line that has sagged below the surrounding grade, creating a low point where solids settle and accumulate rather than being carried downstream by gravity. Bellies develop from soil settlement, improper original installation, or ground movement — all common in NJ's varied geological terrain.
A belly doesn't cause an immediate backup — it creates a slow, gradual accumulation of solids that gets worse over time. Camera inspection identifies bellies accurately; the fix depends on depth and accessibility.
What to Do When a Sewer Backup Happens
- Stop using all water immediately — every flush adds to the backup pressure
- Do not enter flooded areas with sewage present — health hazard
- Call a 24/7 emergency drain cleaning service — this is not a situation that improves with waiting
- Document damage with photos for insurance purposes
- Ventilate the area to dissipate sewer gas
Emergency Sewer Backup Service in NJ
Jersey Drain Cleaning responds 24/7 to sewer backup emergencies throughout New Jersey. We carry sewer cameras, professional electric snakes, and professional hydro jetting equipment on every truck. We identify the cause, clear the backup, and give you an honest assessment of what needs to happen next. Call (201) 675-5985 — a live technician answers every call, any hour.