Spotted Lanternfly inJoliet, ILSPOTTED LANTERNFLY GUIDE
Joliet — a major I-80 freight hub and Will County seat with about 148,000 residents — entered the SLF watch zone in 2024 as spotted lanternfly advanced into the Chicago metro's southwestern quadrant. The city's role as one of the nation's busiest freight interchanges, served by both BNSF and Union Pacific's major classification yards, creates an extremely high SLF introduction risk from rail cargo arriving from infested regions. The Des Plaines River corridor and historic Illinois & Michigan Canal towpath provide additional Tree of Heaven habitat that could facilitate rapid SLF establishment and spread through Will County.
Where it's showing up
Key Neighborhoods
Highest activity zones
SLF Hotspots
Downtown Joliet
Active zone
Romeoville
Active zone
Bolingbrook border
Active zone
Crest Hill
Active zone
Lockport
Active zone
Primary SLF food source
Tree of Heaven in Joliet, IL
Illinois & Michigan Canal corridor and towpath running through Lockport and Joliet supports Tree of Heaven in disturbed historic canal and riparian habitat that creates a continuous SLF dispersal corridor connecting the Chicago metro to central Illinois. Des Plaines River banks through Joliet and Romeoville harbor Tree of Heaven in riparian and floodplain habitat that represents an important establishment zone as SLF pressure builds from the northeast. BNSF and Union Pacific rail yards on Joliet's south side — one of the largest freight interchange complexes in North America — carry extensive rail-margin Tree of Heaven that is the highest-priority SLF introduction pathway in Will County.
Identify Tree of Heaven →Local action resources
What To Do in Joliet, IL
Report a Sighting
Every sighting in Joliet, IL maps the invasion front. Report directly to Illinois 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 IL State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full IL guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Joliet, IL. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Joliet, IL.
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