White Sulphur Springs (Hooniah H S) is a natural thermal spring in Alaska. Its water was recorded at about 111°F (44°C) at the surface — a hot water temperature. That figure is a historical maximum surface reading from the USGS thermal-springs inventory, not the temperature of a soaking pool, and it doesn't tell you whether the spring is developed, accessible, or safe to enter.
Hotter than the 104°F hot-tub limit that health agencies recommend — too hot for many people, with a real risk of overheating and burns. Test the water and keep exposure short, if you enter at all.
Because White Sulphur Springs (Hooniah H S)'s recorded temperature is above the level health agencies consider safe for soaking (about 104°F / 40°C), treat it as a hazard first. Water this hot can cause burns, and the recorded figure is the hottest point at the source — cooler mixing pools may or may not exist. Never assume a spring is safe to enter based on this classification alone.
This listing comes from the USGS/NOAA thermal-springs inventory (a reference dataset compiled from records dating to the 1960s–1980s). It does not include ownership, developed-vs-primitive status, or access rights. Many U.S. thermal springs sit on private, tribal, or protected land, or are undeveloped and unsafe — always verify legal access and current conditions with the land manager before visiting, and follow Leave No Trace.