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EarthEcho Water Challenge

The EarthEcho Water Challenge (formerly World Water Monitoring Challenge) is an international program that runs annually from March 22 (the United Nations World Water Day) through December and equips anyone to protect the water resources we depend on every day. The EarthEcho Water Challenge builds public awareness and involvement in protecting water resources around the world by engaging citizens to conduct basic monitoring of their local waterbodies.

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    • août 2018
      Source : EarthEcho Water Challenge
      Téléchargé par : Knoema
      Accès le : 22 août, 2018
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      The pH of pure water is 7. In general, water with a pH lower than 7 is considered acidic, and with a pH greater than 7 is considered basic. The normal range for pH in surface water systems is 6.5 to 8.5, and the pH range for groundwater systems is between 6 to 8.5.