Spotted Lanternfly inNew Castle, PASPOTTED LANTERNFLY GUIDE
New Castle, Pennsylvania — a Steel Valley city of about 21,000 in Lawrence County — confirmed spotted lanternfly in 2022. The city's post-industrial landscape of former steel mill brownfields and Shenango River bottomlands provides some of the densest Tree of Heaven habitat in western PA, making it a notable SLF establishment site despite its small population. Pennsylvania is under a statewide SLF quarantine; residents should report sightings to the PA Department of Agriculture and take care not to move potentially infested materials out of the area.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Downtown New Castle
Active zone
North Hill
Active zone
South New Castle
Active zone
Ellwood City corridor
Active zone
Neshannock Township
Active zone
Primary SLF food source
Tree of Heaven in New Castle, PA
Shenango River banks running through New Castle's former steel mill districts are heavily colonized by Tree of Heaven — a classic brownfield pioneer species. The abandoned steel mill brownfields throughout Lawrence County are among the most prolific TOH colonization sites in western PA, and the Norfolk Southern Youngstown Line through the city is the primary dispersal corridor linking New Castle SLF populations to Pittsburgh and Youngstown.
Identify Tree of Heaven →Active Quarantine Alert
Pennsylvania is under a statewide spotted lanternfly quarantine. Moving plants, outdoor furniture, or vehicles out of the quarantine zone requires inspection.
Local action resources
What To Do in New Castle, PA
Report a Sighting
Every sighting in New Castle, PA maps the invasion front. Report directly to PA Dept 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 PA State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full PA guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in New Castle, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in New Castle, PA.
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