The natural currents continually bring a fresh supply of ocean water to the island. Warm surface water in tropical areas have low nutrient concentrations. This limits the amount of zooplankton and phytoplankton which would otherwise cloud the water some.
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Originating atop the volcano as rain and snowmelt – the water slowly filters through thousands of feet of porous, volcanic rock, re-emerging at the surface as refreshingly crisp, naturally alkaline water.
Now, thanks to the U.S. military and overtourism, the people of Hawaii are facing one of the largest water crises they have ever seen. Navy fuel contamination has severely threatened their water supply, posing dangerous health risks, while the tourism sector guzzles water as usual.
While there are a few places that boast extremely clean water, such as Canada, Iceland, Antarctica, or even Upstate New York, the team of scientists determined that the cleanest water in the world was in the Patagonia region of Chile, Puerto Williams.
Ocean currents in the Subtropical Gyre transport cooler waters from the northeast Pacific to the west and south, warming as it moves to the subtropical Pacific and the vicinity of Hawai'i. Similarly, warm water from the western subtropical Pacific is transported towards Japan, cooling as it moves northward.
Oahu's windward coast – specifically the 10-mile stretch from the Marine Corps Base Kaneohe to Makapu'u Beach Park – is home to the bluest water in Hawaii, sure to make your next beach day unforgettable.
1. The Maldives. The Maldives, located in the Indian Ocean, have around 1,190 islands and sandbanks. A lagoon with crystal clear water encircles all the islands, which are protected by a reef structure that is home to an array of underwater life.