National parks
52 parks
The National Park Service reports invasive plant species in 52 park units and more than 1.4 million infested acres.
View sourceInvasive Species in the USA(Is it USA?) turns county-level data into a map people can actually use.Instead of forcing people through scattered PDFs, agency pages, or state lists, the project enablesinvasive species detection & mitigation for the people who live, work, hike, fish, farm, and restore.
National parks
The National Park Service reports invasive plant species in 52 park units and more than 1.4 million infested acres.
View sourceHabitat competition
NPS emphasizes that invasive species often outcompete native species and destroy habitat, which is why early detection and rapid response matters.
View sourceAgriculture and forests
USDA identifies invasive pests and weeds as a direct threat to crops, forests, grazing systems, and plant trade pathways.
View sourceWaterways and fisheries
USFWS highlights how invasive aquatic plants and animals can disrupt food webs, water access, and habitat quality when they spread between waters.
View sourceData foundation
Project Isitusa is designed around county-level invasive species exploration. The current release uses a full verified lower-48 invasive species catalog from US-RIIS, plus a stored merged county presence snapshot from April 15, 2026 using EDDMaps and USGS NAS where verified county records are available. Remaining county-level gaps are surfaced explicitly in the explorer while those records continue to be filled in.