Hydrilla Distribution in the United States
Comprehensive state-by-state overview of Hydrilla verticillata distribution across the United States, organized by ecological region.
In This Section
Southeast United States
The southeastern United States represents the most established Hydrilla range in North America due to favorable climate, interconnected waterways, and long-term introduction history.
Gulf Coast & Lower Mississippi Basin
Gulf states experience dense vegetative growth in warm freshwater systems with high nutrient availability.
Inland River & Reservoir Systems
Inland impoundments and TVA-managed reservoirs provide stable habitat conducive to Hydrilla establishment.
Mid-Atlantic Region
Mid-Atlantic freshwater systems provide transitional habitats between southern and northeastern watersheds.
Western United States
Western detections are primarily associated with managed reservoirs, irrigation canals, and interstate water transfer systems.
References
Information presented on this page is supported by peer-reviewed research, federal agencies, and state resource management programs.
- U.S. Geological Survey (USGS) – Nonindigenous Aquatic Species Databasehttps://nas.er.usgs.gov
- U.S. Army Corps of Engineers – Aquatic Plant Control Research Programhttps://www.erdc.usace.army.mil