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• 20:54, 30 November 2022 Nikolas talk contribs created page 109. Health effects of microbiological and chemical water pollutants, water quality testing (Created page with "* Natural ingredients of water ** Iodine, fluoride, calcium, magnesium, sodium, etc. ** The calcium and magnesium content of water determines its ''hardness'' *** Hardness should be around 5 – 35 degrees ** High sodium intake increases risk for hypertension ** Fluoride in water *** Protects against dental caries *** Too high level gives dental fluorosis, fragile bones *** Level should be 0,7 – 1,2 mg/L *** Fluoridation of drinking water may be necessary to reach opti...") Tag: Visual edit