Our team can assemble your watershed collection based on any combination of 6- to 12-digit hydrologic unit codes defined by the U.S. Geological Survey. (e.g. Upper Illinois (HUC6) > Iroquois (HUC8) > Mud Creek (HUC10) > Whiskey Creek (HUC12)). If you're not sure which basins would be most useful to you, we'll help you create a watershed collection that makes sense based on your organization's territory.