Spotted Lanternfly inPassaic County, NJSPOTTED LANTERNFLY GUIDE
Passaic County — with Paterson as its county seat, the second largest city in New Jersey — confirmed SLF in 2020. Paterson's historic identity as Silk City is tied to its industrial canals, which are now lined with Tree of Heaven, creating ideal SLF habitat corridors through the urban core. Great Falls National Historical Park, one of the few urban national parks in the United States, has become a notable SLF hotspot. The Passaic River corridor and NJ Transit Main/Bergen County rail lines have accelerated SLF spread throughout the county, and the Route 3/46 commercial corridor is a major reinforcement node via vehicle and freight traffic.
Highest activity zones
SLF Hotspots in Passaic County, NJ
Great Falls National Historical Park
Active zone
Passaic River Heritage Trail
Active zone
Garret Mountain Reservation
Active zone
Paterson Great Falls area
Active zone
Route 3/46 commercial corridor
Active zone
Primary SLF food source
Tree of Heaven in Passaic County, NJ
Tree of Heaven is pervasive along Paterson's historic industrial canals and the Passaic River corridor throughout Passaic County. The Great Falls National Historical Park area has dense Ailanthus populations lining the gorge and surrounding urban fabric, making it one of the most significant urban SLF sites in New Jersey. NJ Transit Main/Bergen County Line rail embankments have heavy ToH coverage that extends SLF habitat from Paterson south through the county. Garret Mountain Reservation road margins and the Route 3/46 corridor are additional high-priority monitoring zones.
Identify Tree of Heaven →Local action resources
What To Do in Passaic County, NJ
Report a Sighting
Every sighting in Passaic County, NJ maps the invasion front. Report directly to NJ Department of Agriculture.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full NJ State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full NJ guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Passaic County, NJ. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Passaic County, NJ.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Passaic County, NJ.