Blue Lake is a small fresh water lake in Nelson Lakes National Park, in the northern reaches of New Zealand's South Island. The lake has extreme visual clarity, with visibility tests showing visibility of up to 80 meters. Blue Lake in Nelson Lakes National Park is regarded as the clearest lake in the world. Blue Lake is characterized by blue-violet hues seen only in the very clearest natural waters. Its clarity reveals water's natural blue-violet color.
The visibility of distilled water is about 80 meters, as estimated from the best available instrumental measurements in the laboratory. Researchers have found that the Blue Lake has visual clarity of about 76 meters, which is almost as optically clear as distilled water. Blue Lake's visibility even surpasses that of the famous Te Waikoropupu Springs in Golden Bay, which has a visibility of 63 meters. The lake's clarity might be bettered only by ocean waters such as those in the southeast Pacific near Easter Island.
Blue Lake is fed by a short upper segment of the Sabine River, which in turn is fed by underground passage through the landslide debris impounding the much larger Lake Constance. Scientists attribute the clarity of the Blue Lake water to its passage underground from Lake Constance, which filters out nearly all the particles suspended in the water.
The visibility of distilled water is about 80 meters, as estimated from the best available instrumental measurements in the laboratory. Researchers have found that the Blue Lake has visual clarity of about 76 meters, which is almost as optically clear as distilled water. Blue Lake's visibility even surpasses that of the famous Te Waikoropupu Springs in Golden Bay, which has a visibility of 63 meters. The lake's clarity might be bettered only by ocean waters such as those in the southeast Pacific near Easter Island.
Blue Lake is fed by a short upper segment of the Sabine River, which in turn is fed by underground passage through the landslide debris impounding the much larger Lake Constance. Scientists attribute the clarity of the Blue Lake water to its passage underground from Lake Constance, which filters out nearly all the particles suspended in the water.
