Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater …

Freshwater is leading an innovative partnership for clean water called Greater Lakes Promise. With support from the Great Lakes Protection Fund, the project includes several land trusts …

Apr 3, 2025 · Every living thing on Earth needs water to survive, but more than 100,000 species, including our own, need a special kind of water that can only be found in certain places and is …

Dec 23, 2025 · From sustaining agriculture and energy to shaping landscapes and communities, freshwater is essential. NASA’s Earth science data helps the nation manage this vital …

Jun 8, 2018 · The definition of freshwater is water containing less than 1,000 milligrams per liter of dissolved solids, most often salt. As a part of the water cycle, Earth's surface-water bodies are …

Freshwater is defined as having a low salt concentration usually less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in …

Get a foundational understanding of freshwater wetlands: how they are defined by water, their major classifications, and their critical role in nature.

Water is the world's most precious resource. WWF protects freshwater ecosystems—securing clean water, healthy rivers, and biodiversity for people & nature.

Jun 16, 2025 · Freshwater ecosystems are characterized by their low salt concentration, typically less than 1% (or 1 part per thousand). This distinguishes them from marine and estuarine …

Of all the water on Earth, just 2.5% is fresh water, and most of that is locked up in ice or deep underground. Rivers and lakes hold only a tiny fraction – but it’s this that so much life on Earth …