Spotted Lanternfly inCoatesville, PASPOTTED LANTERNFLY GUIDE
Coatesville confirmed SLF in 2017 — among the earliest confirmations in Chester County, reflecting the city's position in the SLF expansion corridor from Berks County. The former Lukens Steel brownfield site is one of the most significant Tree of Heaven colonization areas in western Chester County, providing prime SLF habitat across a large disturbed industrial footprint. SEPTA's Paoli/Thorndale Regional Rail Line connects Coatesville to Philadelphia's established infestation zone, and the US-30 Lincoln Highway corridor is a major vehicle-based spread vector running through this steel manufacturing legacy community.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Former Lukens Steel brownfield (major TOH colonization site)
Active zone
Brandywine Creek headwaters corridor
Active zone
US-30 Lincoln Highway corridor margins
Active zone
SEPTA Paoli/Thorndale Line Coatesville station
Active zone
West End disturbed lot TOH network
Active zone
Primary SLF food source
Tree of Heaven in Coatesville, PA
The former Lukens Steel brownfield in Coatesville is a major Tree of Heaven colonization site — one of the most significant in western Chester County. Disturbed industrial soils with minimal competition allow TOH to dominate the brownfield landscape, creating dense SLF habitat across a large urban footprint. The Brandywine Creek headwaters corridor extends prime TOH-supported SLF habitat into the surrounding Chester County landscape. SEPTA's Paoli/Thorndale Line is a documented SLF spread vector connecting Coatesville's established populations directly to Philadelphia. US-30 Lincoln Highway corridor margins have established TOH providing continuous east-west SLF spread pathways through this historically significant steel city.
Identify Tree of Heaven →Local action resources
What To Do in Coatesville, PA
Report a Sighting
Every sighting in Coatesville, PA maps the invasion front. Report directly to Pennsylvania 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 Pennsylvania State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Pennsylvania guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Coatesville, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Coatesville, PA.
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