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2. Total dissolved solids - Wikipedia

   en.wikipedia.org/wiki/Total_dissolved_solids

   Total dissolved solids (TDS) is a measure of the dissolved content of inorganic and organic substances in water. Learn about the sources, methods, and effects of TDS on water quality and human activities.

3. Fresh water - Wikipedia

   en.wikipedia.org/wiki/Fresh_water

   Fresh water is any liquid or frozen water with low salinity and dissolved solids. Learn about the types, systems, sources, distribution and uses of fresh water on Earth, and the challenges of water scarcity and pollution.

4. Conductivity (electrolytic) - Wikipedia

   en.wikipedia.org/wiki/Conductivity_(electrolytic)

   Learn about the SI unit of conductivity (S/m) and how it measures the ability of an electrolyte solution to conduct electricity. Find out the factors that affect conductivity, such as temperature, concentration, and ionic composition, and see tables of reference conductivities.

5. Water quality - Wikipedia

   en.wikipedia.org/wiki/Water_quality

   Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage. Learn about the different categories of water quality, such as human consumption, industrial and domestic use, and environmental water quality, and their impacts on public health and ecosystems.

6. Takhini Hot Springs - Wikipedia

   en.wikipedia.org/wiki/Takhini_Hot_Springs

   Takhini Hot Springs is a natural hot springs near Whitehorse, Yukon, Canada. It has a history of over 100 years, two pools at different temperatures, a campground and an annual hair freezing contest.

7. Lime softening - Wikipedia

   en.wikipedia.org/wiki/Lime_softening

   Lime softening is a process that uses limewater to remove hardness and microorganisms from water by precipitation. It also reduces the total dissolved solids and can be combined with membrane processes.