Spotted Lanternfly inColumbia County, PASPOTTED LANTERNFLY GUIDE
Columbia County — confirmed for SLF in 2018 — is a northeastern Pennsylvania county anchored by Bloomsburg, home to Bloomsburg University of Pennsylvania. The I-80 corridor cuts through the county from east to west, connecting the established Monroe and Carbon County infestation zones westward through Columbia County and beyond — making it one of the most significant SLF spread vectors in the region. The Susquehanna River corridor running through Bloomsburg provides a natural SLF dispersal pathway north and south through the county. Columbia County sits at the transition zone between the anthracite coal heritage landscape to the east and the agricultural Susquehanna Valley to the west — a landscape with limited county extension resources relative to the scale of SLF management challenge the county faces.
Highest activity zones
SLF Hotspots in Columbia County, PA
Bloomsburg University campus
Active zone
Susquehanna River corridor through Bloomsburg
Active zone
I-80 east-west freight and tourism corridor
Active zone
Bloomsburg Town Square and downtown margins
Active zone
Anthracite region transition zone road margins
Active zone
Primary SLF food source
Tree of Heaven in Columbia County, PA
Tree of Heaven is established along the I-80 corridor and Susquehanna River margins throughout Columbia County, creating primary SLF dispersal pathways through the heart of this northeastern Pennsylvania county. Bloomsburg University campus edges and the downtown Bloomsburg margins have Ailanthus colonization in urban and suburban zones. The anthracite region transition road margins to the east — where disturbed mine-adjacent landscapes have been heavily colonized by ToH — are priority monitoring zones as SLF populations continue to advance through Columbia County.
Identify Tree of Heaven →Local action resources
What To Do in Columbia County, PA
Report a Sighting
Every sighting in Columbia County, 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 Columbia County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Columbia County, PA.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Columbia County, PA.