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Hoboken · Flooding

Flooding & sewer backups in Hoboken

Hoboken sits on low ground with a combined sewer that carries rain and wastewater together. When heavy rain meets high tide, garden units and basements take the hit. Here's how the system works and what protects your building.

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Call about a Hoboken backup1-888-503-1510

Takes about a minute. Tell us what's happening, what kind of building it is, and the town or neighborhood.

During a flood

Stay out of standing water near electrical equipment, don't use water in the building if the floor drain is backing up, and avoid contact with sewage. Sign up for city alerts for flood warnings.

01Flooding & sewer backups in Hoboken: at a glance

Sewer system
Combined sewer: rain and wastewater share the same pipes. Run by the North Hudson Sewerage Authority (NHSA)
Why it floods
Low elevation and high tides: when the Hudson is high, stormwater can't drain out by gravity
City defenses
NHSA wet-weather pump stations H1 (southwest Hoboken, 2011) and H5 (northwest Hoboken, 2016) push stormwater out against the tide
Most exposed
Garden and basement units in rowhouses, especially in the western, lower-lying parts of the city
Who can do plumbing work
NJ licensed master plumbers; permits from Hoboken's construction office

New to this topic? The general guide covers the basics: flooding & sewer backups.

02What's different in Hoboken

Elsewhere, storm drains and sanitary sewers are often separate. In Hoboken they're one system. In a cloudburst the pipes fill with rainwater, and if the tide is high there's nowhere for it to go. Water then rises up through the lowest openings: street catch basins, and basement or garden-unit floor drains.

NHSA's wet-weather pumps have sharply cut street flooding; NHSA reports they prevented flooding in most recorded events since they came online. But a rowhouse with a garden unit below street level can still see backups in extreme storms, so building-level protection matters.

03Typical situations

Hoboken buildings and flood riskNeighborhoods and building types are examples. Every property is different.
BuildingTypical issueWhat helps
Rowhouse with garden unit below gradeFloor drain or toilet backs up in heavy rain at high tideBackwater valve on the building sewer, raised fixtures, a plan for storms
Condo conversion with shared linesOne unit's drain backs up for everyoneAssociation-level fix; clear responsibility in the master deed
Newer mid- and high-riseGarage and lower-level drainageBuilding engineer and pumps; check ejector pumps
Any building, dry weather backupClog in your own line, not the cityDrain cleaning and camera inspection

04How the job usually goes in Hoboken

  1. Find out whether backups happen in dry weather (your line) or only in storms with high tide (the city system)
  2. Clear and camera the building sewer to make sure your line is sound
  3. Assess backwater protection for the lowest fixtures, and whether a sewage ejector suits a below-grade unit
  4. Install with a permit from the Hoboken construction office, with access for maintenance
  5. Set a storm routine: valves checked, no water use during backups, valuables off the floor

05Permits, licenses & who to contact

  • Plumbing work: NJ licensed master plumber. Who can do plumbing in NJ
  • Permits: Hoboken construction office under the NJ Uniform Construction Code. NJ permits
  • Sewers and pump stations: North Hudson Sewerage Authority
  • Water service: Veolia (formerly SUEZ)

06What affects the price in Hoboken

  • Whether your building sewer also needs cleaning or repair
  • Where a backwater valve can be installed and whether excavation is needed
  • Number of below-grade fixtures to protect, or whether an ejector pump is needed
  • Condo association approvals and shared-line work

Prices are set by the plumber. Ask for the price, or how it will be calculated, before work starts.

07Before you call

Having this ready makes the first call faster:

  • Which floor and fixtures backed up, and the date and weather
  • Whether it coincided with high tide or a storm warning
  • Whether you own the building or a condo unit
  • Photos of the water and its source
  • Your flood and sewer backup insurance details

08Hoboken: frequently asked questions

Why does Hoboken flood when it rains hard?

Low elevation, a combined sewer and tides. When rain is heavy and the river is high, stormwater can't drain out; the NHSA pump stations push it out to reduce flooding.

Will a backwater valve help my garden unit?

It can stop sewage from rising through your building sewer if installed and maintained correctly. It won't stop surface water coming in through doors or windows.

Who fixes it in a converted condo?

Usually the association handles shared lines and the owner handles fixtures in the unit, but the master deed and bylaws decide.

Sources & review

Last reviewed . General information, not legal or engineering advice. Rules change and individual buildings differ.

  1. North Hudson Sewerage Authority, wet weather facts
  2. City of Hoboken, flood pumps
  3. NHSA storm report, August 7, 2026
  4. N.J.A.C. 13:32-1.4, who may perform plumbing in NJ