Flooding in North Haledon, New Jersey: a short record, steep brooks, and what to watch
By the measure of flood insurance claims, North Haledon is one of the driest places in Passaic County. The water problems it does have come from steep, fast streams and heavy rain, not from a river spreading across a valley floor.
FEMA's National Flood Insurance Program records 17 flood claims in North Haledon since the programme began and no repetitive-loss properties at all. Hurricane Floyd in 1999 and Hurricane Ida in 2021 account for most of them. FEMA's flood study describes moderate flooding beside High Mountain Road and fast, erosive flows in the borough's steep stream channels. For most households here, the realistic risks are a wet basement, an overwhelmed drain or a failed sump pump rather than an overflowing brook, and this page is written with that in mind.
The short version
- FEMA NFIP records show 17 lifetime flood claims in North Haledon and no repetitive-loss properties.
- Hurricane Floyd (6 claims) and Hurricane Ida (4) are the storms that dominate the record.
- FEMA's flood study notes moderate flooding near High Mountain Road and bank erosion from fast flows in steep channels.
- By our calculation from FEMA and Census figures, the borough has under six claims per 1,000 homes, against more than 330 in Wayne.
Seventeen claims in five decades
FEMA's OpenFEMA data lists 17 NFIP flood claims for the Borough of North Haledon. The years with the most are 1999 (6), 2021 (5), 2011 (2) and 1982 (1). Six are tied to Hurricane Floyd, four to Hurricane Ida, and one each to Hurricane Irene and Hurricane Sandy. FEMA's Multiple Loss Properties data, as of 2 August 2026, shows no repetitive-loss and no severe repetitive-loss properties in the borough: no insured building here has flooded badly enough, often enough, to be placed on that list. The US Census Bureau counts 8,778 residents and 3,087 housing units, so by our own calculation that is under six claims per 1,000 homes over the whole period. Downstream Wayne, by the same arithmetic, is past 330. The Census puts North Haledon's median year built at 1965, and only 6.3 per cent of households rent.
What FEMA's flood study describes
The countywide Flood Insurance Study for Passaic County, revised April 17, 2020, lists Molly Ann Brook as a flood source for North Haledon, along with Haledon, Prospect Park and Paterson downstream. For the borough itself it is brief and specific. It records moderate flooding in the area next to High Mountain Road. And it notes that streams in North Haledon show potential bank degradation and erosion because of high-velocity flows in steep channels. That second point is the more characteristic one. A brook running down a steep channel carries water away quickly, which limits how far it spreads, but the speed of that water undercuts banks, moves debris and can damage culverts, retaining walls and yards that back onto a stream.
What the borough planned to do
The FEMA study reproduces the mitigation actions listed for each municipality in the 2010 Passaic County hazard mitigation plan. For North Haledon they were backup power; moving utilities out of the flood-prone basement of the Municipal Building; stream bank stabilisation and bank augmentation along Molly Ann Brook; and an inundation study for Yahn's Pond Dam. These were planned actions at the time, and the study does not report whether each was completed. They are still a useful guide to what local officials saw as the weak points: a basement that took water, eroding stream banks, and a small dam whose failure would need to be understood.
Floyd and Ida: the two storms that show up
Floyd in September 1999 and Ida in September 2021 together account for ten of the borough's seventeen claims. Both were tropical systems that arrived in September, and in a borough of steep brooks how hard rain falls matters more than how long a wet spell lasts. Ida was declared a federal disaster for Passaic County, DR-4614. Irene in 2011, which produced record river crests at Pompton Lakes and Little Falls and thousands of claims downstream, appears only once in North Haledon's record. If a storm forecast talks about rainfall rates, inches per hour, rather than storm totals, that is the kind of event to take seriously here.
The more likely sources of water indoors
In a borough with no repetitive-loss properties, most water damage will not involve a flood claim. The usual suspects in a 1960s house on a slope: surface water running toward the foundation from higher ground, groundwater rising under a basement slab after prolonged rain, a sump pump that stops when the power does, and floor drains backing up when the sewer system is overloaded. Each is handled differently by insurers. Flood cover is a separate policy; sewer backup cover is commonly an add-on to a homeowners policy; and seepage through a foundation is often excluded. Whether a particular loss is covered is decided by your insurer and your policy wording, so it is worth reading the exclusions before a wet spring rather than after.
What this means if you own or rent here
Look up your own address at the FEMA Flood Map Service Center; North Haledon's current effective flood maps are dated April 17, 2020. If your property backs onto a brook or sits near High Mountain Road, watch the bank after big storms for undercutting and keep culverts and grates clear of debris. Inside, grade soil and downspouts away from the house and test the sump pump before the wet season. If you are weighing flood insurance outside a mapped zone, FEMA's FloodSmart site reports that nearly one third of NFIP claims from 2014 to 2024 came from outside high-risk areas, and a new policy normally takes effect only after 30 days.
Common questions
Does North Haledon flood?
Not often, judging by FEMA's NFIP record of 17 claims over the life of the programme and no repetitive-loss properties. FEMA's flood study does note moderate flooding beside High Mountain Road and erosion along steep stream channels, and heavy rain can still put water into basements.
Which streams cause flooding in North Haledon?
FEMA's Flood Insurance Study for Passaic County names Molly Ann Brook as a flood source for the borough and describes the local streams as steep, with high-velocity flows that can erode their banks.
Do I need flood insurance in North Haledon if I am not in a flood zone?
It is not required outside a mapped high-risk zone, and the decision is yours. FEMA reports that nearly one third of NFIP claims from 2014 to 2024 came from outside high-risk areas, and most homeowners policies exclude flood. Check your address at the FEMA Flood Map Service Center first.
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